78408706 has 16 divisors (see below), whose sum is σ = 124034400. Its totient is φ = 37071648.

The previous prime is 78408619. The next prime is 78408719. The reversal of 78408706 is 60780487.

It is a super-2 number, since 2×78408706² = 12295850353188872, which contains 22 as substring.

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, 22830 + ... + 26038.

It is an arithmetic number, because the mean of its divisors is an integer number (7752150).

Almost surely, 2^78408706 is an apocalyptic number.

78408706 is a deficient number, since it is larger than the sum of its proper divisors (45625694).

78408706 is a wasteful number, since it uses less digits than its factorization.

78408706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3873.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 78408706 is about 8854.8690560618. The cubic root of 78408706 is about 428.0108340053.

The spelling of 78408706 in words is "seventy-eight million, four hundred eight thousand, seven hundred six".