78428702 has 16 divisors (see below), whose sum is σ = 132764400. Its totient is φ = 34419840.

The previous prime is 78428699. The next prime is 78428719. The reversal of 78428702 is 20782487.

It is a super-2 number, since 2×78428702² = 12302122594809608, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60827 + ... + 62102.

It is an arithmetic number, because the mean of its divisors is an integer number (8297775).

Almost surely, 2^78428702 is an apocalyptic number.

78428702 is a deficient number, since it is larger than the sum of its proper divisors (54335698).

78428702 is a wasteful number, since it uses less digits than its factorization.

78428702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122971.

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 78428702 is about 8855.9980803973. The cubic root of 78428702 is about 428.0472150725.

The spelling of 78428702 in words is "seventy-eight million, four hundred twenty-eight thousand, seven hundred two".