156959440 has 80 divisors (see below), whose sum is σ = 400795776. Its totient is φ = 56691200.

The previous prime is 156959423. The next prime is 156959497. The reversal of 156959440 is 44959651.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×156959440² = 49272531610227200, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 151725 + ... + 152755.

Almost surely, 2^156959440 is an apocalyptic number.

156959440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156959440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200397888).

156959440 is an abundant number, since it is smaller than the sum of its proper divisors (243836336).

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

156959440 is a wasteful number, since it uses less digits than its factorization.

156959440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228 (or 1222 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 156959440 is about 12528.3454613927. The cubic root of 156959440 is about 539.4226110197.

It can be divided in two parts, 1569 and 59440, that added together give a square (61009 = 247²).

The spelling of 156959440 in words is "one hundred fifty-six million, nine hundred fifty-nine thousand, four hundred forty".