78290372 has 54 divisors (see below), whose sum is σ = 154412622. Its totient is φ = 34610688.

The previous prime is 78290347. The next prime is 78290419. The reversal of 78290372 is 27309287.

It can be written as a sum of positive squares in 9 ways, for example, as 4227136 + 74063236 = 2056^2 + 8606^2 .

It is a super-2 number, since 2×78290372² = 12258764695796768, 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 17 ways as a sum of consecutive naturals, for example, 2115938 + ... + 2115974.

It is an arithmetic number, because the mean of its divisors is an integer number (2859493).

Almost surely, 2^78290372 is an apocalyptic number.

It is an amenable number.

78290372 is a deficient number, since it is larger than the sum of its proper divisors (76122250).

78290372 is a wasteful number, since it uses less digits than its factorization.

78290372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 78290372 is about 8848.1846725755. The cubic root of 78290372 is about 427.7954083749.

The spelling of 78290372 in words is "seventy-eight million, two hundred ninety thousand, three hundred seventy-two".