78272940 has 48 divisors (see below), whose sum is σ = 222888960. Its totient is φ = 20518080.

The previous prime is 78272927. The next prime is 78272993. The reversal of 78272940 is 4927287.

It is a super-2 number, since 2×78272940² = 12253306272487200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7516 + ... + 14595.

It is an arithmetic number, because the mean of its divisors is an integer number (4643520).

Almost surely, 2^78272940 is an apocalyptic number.

It is an amenable number.

78272940 is an abundant number, since it is smaller than the sum of its proper divisors (144616020).

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

78272940 is a wasteful number, since it uses less digits than its factorization.

78272940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22182 (or 22180 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 78272940 is about 8847.1995569220. The cubic root of 78272940 is about 427.7636552873.

The spelling of 78272940 in words is "seventy-eight million, two hundred seventy-two thousand, nine hundred forty".