156390240 has 48 divisors (see below), whose sum is σ = 492630768. Its totient is φ = 41703936.

The previous prime is 156390229. The next prime is 156390253. The reversal of 156390240 is 42093651.

It is a tau number, because it is divible by the number of its divisors (48).

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 = 156390198 and 156390207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162427 + ... + 163386.

It is an arithmetic number, because the mean of its divisors is an integer number (10263141).

Almost surely, 2^156390240 is an apocalyptic number.

156390240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156390240 is an abundant number, since it is smaller than the sum of its proper divisors (336240528).

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

156390240 is a wasteful number, since it uses less digits than its factorization.

156390240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325831 (or 325823 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 156390240 is about 12505.6083418601. The cubic root of 156390240 is about 538.7697645468.

The spelling of 156390240 in words is "one hundred fifty-six million, three hundred ninety thousand, two hundred forty".