320056140 has 48 divisors (see below), whose sum is σ = 943326720. Its totient is φ = 80856000.

The previous prime is 320056103. The next prime is 320056171. The reversal of 320056140 is 41650023.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139236 + ... + 141515.

It is an arithmetic number, because the mean of its divisors is an integer number (19652640).

Almost surely, 2^320056140 is an apocalyptic number.

320056140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320056140 is an abundant number, since it is smaller than the sum of its proper divisors (623270580).

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

320056140 is a wasteful number, since it uses less digits than its factorization.

320056140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280782 (or 280780 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 320056140 is about 17890.1129118852. The cubic root of 320056140 is about 684.0303755191.

It can be divided in two parts, 3200 and 56140, that added together give a triangular number (59340 = T₃₄₄).

The spelling of 320056140 in words is "three hundred twenty million, fifty-six thousand, one hundred forty".