134531640 has 96 divisors (see below), whose sum is σ = 438937200. Its totient is φ = 35735040.

The previous prime is 134531633. The next prime is 134531687. The reversal of 134531640 is 46135431.

134531640 is a `hidden beast` number, since 1 + 345 + 316 + 4 + 0 = 666.

It is a super-2 number, since 2×134531640² = 36197524322179200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118596 + ... + 119724.

Almost surely, 2^134531640 is an apocalyptic number.

134531640 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 134531640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219468600).

134531640 is an abundant number, since it is smaller than the sum of its proper divisors (304405560).

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

134531640 is a wasteful number, since it uses less digits than its factorization.

134531640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477 (or 1470 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 134531640 is about 11598.7775217908. Note that the first 3 decimals coincide. The cubic root of 134531640 is about 512.3988489646.

The spelling of 134531640 in words is "one hundred thirty-four million, five hundred thirty-one thousand, six hundred forty".