156873940 has 12 divisors (see below), whose sum is σ = 329435316. Its totient is φ = 62749568.

The previous prime is 156873923. The next prime is 156873947. The reversal of 156873940 is 49378651.

156873940 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 21104836 + 135769104 = 4594^2 + 11652^2 .

It is a super-2 number, since 2×156873940² = 49218866102247200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156873947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3921829 + ... + 3921868.

It is an arithmetic number, because the mean of its divisors is an integer number (27452943).

Almost surely, 2^156873940 is an apocalyptic number.

156873940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156873940 is an abundant number, since it is smaller than the sum of its proper divisors (172561376).

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

156873940 is a wasteful number, since it uses less digits than its factorization.

156873940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7843706 (or 7843704 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 156873940 is about 12524.9327343503. The cubic root of 156873940 is about 539.3246472610.

The spelling of 156873940 in words is "one hundred fifty-six million, eight hundred seventy-three thousand, nine hundred forty".