134285840 has 40 divisors (see below), whose sum is σ = 336233688. Its totient is φ = 49582080.

The previous prime is 134285821. The next prime is 134285843. The reversal of 134285840 is 48582431.

It can be written as a sum of positive squares in 4 ways, for example, as 4096 + 134281744 = 64^2 + 11588^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 134285840.

It is not an unprimeable number, because it can be changed into a prime (134285843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63521 + ... + 65600.

Almost surely, 2^134285840 is an apocalyptic number.

134285840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

134285840 is an abundant number, since it is smaller than the sum of its proper divisors (201947848).

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

134285840 is a wasteful number, since it uses less digits than its factorization.

134285840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129147 (or 129141 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 134285840 is about 11588.1767332053. The cubic root of 134285840 is about 512.0865942403.

The spelling of 134285840 in words is "one hundred thirty-four million, two hundred eighty-five thousand, eight hundred forty".