156973140 has 72 divisors (see below), whose sum is σ = 493802400. Its totient is φ = 41858208.

The previous prime is 156973123. The next prime is 156973147. The reversal of 156973140 is 41379651.

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

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 156973095 and 156973104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156973147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11290 + ... + 21009.

Almost surely, 2^156973140 is an apocalyptic number.

156973140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156973140 is an abundant number, since it is smaller than the sum of its proper divisors (336829260).

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

156973140 is a wasteful number, since it uses less digits than its factorization.

156973140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32323 (or 32309 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 156973140 is about 12528.8922096090. The cubic root of 156973140 is about 539.4383048295.

The spelling of 156973140 in words is "one hundred fifty-six million, nine hundred seventy-three thousand, one hundred forty".