78290736 has 20 divisors (see below), whose sum is σ = 202251192. Its totient is φ = 26096896.

The previous prime is 78290731. The next prime is 78290741. The reversal of 78290736 is 63709287.

It is an interprime number because it is at equal distance from previous prime (78290731) and next prime (78290741).

It is a super-2 number, since 2×78290736² = 12258878686843392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78290731) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 815481 + ... + 815576.

Almost surely, 2^78290736 is an apocalyptic number.

It is an amenable number.

78290736 is an abundant number, since it is smaller than the sum of its proper divisors (123960456).

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

78290736 is a wasteful number, since it uses less digits than its factorization.

78290736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631068 (or 1631062 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 78290736 is about 8848.2052417425. The cubic root of 78290736 is about 427.7960713653.

The spelling of 78290736 in words is "seventy-eight million, two hundred ninety thousand, seven hundred thirty-six".