134392440 has 256 divisors, whose sum is σ = 513515520. Its totient is φ = 27371520.

The previous prime is 134392397. The next prime is 134392457. The reversal of 134392440 is 44293431.

134392440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×134392440² = 36122655858307200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 134392398 and 134392407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 338322 + ... + 338718.

It is an arithmetic number, because the mean of its divisors is an integer number (2005920).

Almost surely, 2^134392440 is an apocalyptic number.

134392440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 134392440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256757760).

134392440 is an abundant number, since it is smaller than the sum of its proper divisors (379123080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

134392440 is a wasteful number, since it uses less digits than its factorization.

134392440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 134392440 is about 11592.7753363895. The cubic root of 134392440 is about 512.2220614712. Note that the first 3 decimals are identical.

Subtracting from 134392440 its reverse (44293431), we obtain a palindrome (90099009).

The spelling of 134392440 in words is "one hundred thirty-four million, three hundred ninety-two thousand, four hundred forty".