78958970 has 16 divisors (see below), whose sum is σ = 143593128. Its totient is φ = 31257600.

The previous prime is 78958969. The next prime is 78958973. The reversal of 78958970 is 7985987.

It can be written as a sum of positive squares in 4 ways, for example, as 68840209 + 10118761 = 8297^2 + 3181^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78958973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39731 + ... + 41670.

Almost surely, 2^78958970 is an apocalyptic number.

78958970 is a deficient number, since it is larger than the sum of its proper divisors (64634158).

78958970 is a wasteful number, since it uses less digits than its factorization.

78958970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81505.

The product of its (nonzero) digits is 1270080, while the sum is 53.

The square root of 78958970 is about 8885.8859997189. The cubic root of 78958970 is about 429.0097457953.

The spelling of 78958970 in words is "seventy-eight million, nine hundred fifty-eight thousand, nine hundred seventy".