78970730 has 32 divisors (see below), whose sum is σ = 149516928. Its totient is φ = 29972800.

The previous prime is 78970721. The next prime is 78970751. The reversal of 78970730 is 3707987.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28820 + ... + 31440.

It is an arithmetic number, because the mean of its divisors is an integer number (4672404).

Almost surely, 2^78970730 is an apocalyptic number.

78970730 is a deficient number, since it is larger than the sum of its proper divisors (70546198).

78970730 is a wasteful number, since it uses less digits than its factorization.

78970730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782.

The product of its (nonzero) digits is 74088, while the sum is 41.

The square root of 78970730 is about 8886.5476986285. The cubic root of 78970730 is about 429.0310433720.

The spelling of 78970730 in words is "seventy-eight million, nine hundred seventy thousand, seven hundred thirty".