156433640 has 48 divisors (see below), whose sum is σ = 386894340. Its totient is φ = 56883200.

The previous prime is 156433633. The next prime is 156433663. The reversal of 156433640 is 46334651.

It can be written as a sum of positive squares in 2 ways, for example, as 153412996 + 3020644 = 12386^2 + 1738^2 .

It is a junction number, because it is equal to n+sod(n) for n = 156433597 and 156433606.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11321 + ... + 21000.

Almost surely, 2^156433640 is an apocalyptic number.

156433640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156433640 is an abundant number, since it is smaller than the sum of its proper divisors (230460700).

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

156433640 is a wasteful number, since it uses less digits than its factorization.

156433640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32354 (or 32339 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 156433640 is about 12507.3434429538. The cubic root of 156433640 is about 538.8195981023.

The spelling of 156433640 in words is "one hundred fifty-six million, four hundred thirty-three thousand, six hundred forty".