156434440 has 16 divisors (see below), whose sum is σ = 351977580. Its totient is φ = 62573760.

The previous prime is 156434437. The next prime is 156434441. The reversal of 156434440 is 44434651.

It can be written as a sum of positive squares in 2 ways, for example, as 132756484 + 23677956 = 11522^2 + 4866^2 .

It is a super-2 number, since 2×156434440² = 48943468036227200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (156434441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1955391 + ... + 1955470.

Almost surely, 2^156434440 is an apocalyptic number.

156434440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156434440 is an abundant number, since it is smaller than the sum of its proper divisors (195543140).

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

156434440 is a wasteful number, since it uses less digits than its factorization.

156434440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910872 (or 3910868 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 156434440 is about 12507.3754241248. The cubic root of 156434440 is about 538.8205166067.

The spelling of 156434440 in words is "one hundred fifty-six million, four hundred thirty-four thousand, four hundred forty".