156747640 has 32 divisors (see below), whose sum is σ = 403066080. Its totient is φ = 53741952.

The previous prime is 156747637. The next prime is 156747653. The reversal of 156747640 is 46747651.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 156747593 and 156747602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279627 + ... + 280186.

It is an arithmetic number, because the mean of its divisors is an integer number (12595815).

Almost surely, 2^156747640 is an apocalyptic number.

156747640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156747640 is an abundant number, since it is smaller than the sum of its proper divisors (246318440).

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

156747640 is a wasteful number, since it uses less digits than its factorization.

156747640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559831 (or 559827 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 156747640 is about 12519.8897758726. The cubic root of 156747640 is about 539.1798707364.

The spelling of 156747640 in words is "one hundred fifty-six million, seven hundred forty-seven thousand, six hundred forty".