78642070 has 16 divisors (see below), whose sum is σ = 152444880. Its totient is φ = 29037024.

The previous prime is 78642061. The next prime is 78642073. The reversal of 78642070 is 7024687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78642073) 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, 302340 + ... + 302599.

It is an arithmetic number, because the mean of its divisors is an integer number (9527805).

Almost surely, 2^78642070 is an apocalyptic number.

78642070 is a deficient number, since it is larger than the sum of its proper divisors (73802810).

78642070 is a wasteful number, since it uses less digits than its factorization.

78642070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604959.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 78642070 is about 8868.0364230195. The cubic root of 78642070 is about 428.4350360158.

The spelling of 78642070 in words is "seventy-eight million, six hundred forty-two thousand, seventy".