156143840 has 24 divisors (see below), whose sum is σ = 368890200. Its totient is φ = 62457472.

The previous prime is 156143821. The next prime is 156143851. The reversal of 156143840 is 48341651.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 156143797 and 156143806.

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 3 ways as a sum of consecutive naturals, for example, 487790 + ... + 488109.

It is an arithmetic number, because the mean of its divisors is an integer number (15370425).

Almost surely, 2^156143840 is an apocalyptic number.

156143840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156143840 is an abundant number, since it is smaller than the sum of its proper divisors (212746360).

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

156143840 is an equidigital number, since it uses as much as digits as its factorization.

156143840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975914 (or 975906 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 156143840 is about 12495.7528784784. The cubic root of 156143840 is about 538.4866636523.

The spelling of 156143840 in words is "one hundred fifty-six million, one hundred forty-three thousand, eight hundred forty".