155597040 has 60 divisors (see below), whose sum is σ = 522549144. Its totient is φ = 41492352.

The previous prime is 155597011. The next prime is 155597041. The reversal of 155597040 is 40795551.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 155596986 and 155597004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155597041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107334 + ... + 108773.

Almost surely, 2^155597040 is an apocalyptic number.

155597040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155597040 is an abundant number, since it is smaller than the sum of its proper divisors (366952104).

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

155597040 is a wasteful number, since it uses less digits than its factorization.

155597040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216126 (or 216117 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The square root of 155597040 is about 12473.8542560028. The cubic root of 155597040 is about 537.8573531334.

The spelling of 155597040 in words is "one hundred fifty-five million, five hundred ninety-seven thousand, forty".