78913730 has 32 divisors (see below), whose sum is σ = 164571264. Its totient is φ = 26683776.

The previous prime is 78913721. The next prime is 78913733. The reversal of 78913730 is 3731987.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (78913733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2612 + ... + 12831.

It is an arithmetic number, because the mean of its divisors is an integer number (5142852).

Almost surely, 2^78913730 is an apocalyptic number.

78913730 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78913730 is an abundant number, since it is smaller than the sum of its proper divisors (85657534).

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

78913730 is a wasteful number, since it uses less digits than its factorization.

78913730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15530.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 78913730 is about 8883.3400250131. The cubic root of 78913730 is about 428.9277956010.

The spelling of 78913730 in words is "seventy-eight million, nine hundred thirteen thousand, seven hundred thirty".