78206416 has 10 divisors (see below), whose sum is σ = 151524962. Its totient is φ = 39103200.

The previous prime is 78206399. The next prime is 78206423. The reversal of 78206416 is 61460287.

It can be written as a sum of positive squares in only one way, i.e., 65674816 + 12531600 = 8104^2 + 3540^2 .

It is a super-2 number, since 2×78206416² = 12232487007130112, 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 as a sum of consecutive naturals, namely, 2443935 + ... + 2443966.

Almost surely, 2^78206416 is an apocalyptic number.

It is an amenable number.

78206416 is a deficient number, since it is larger than the sum of its proper divisors (73318546).

78206416 is a wasteful number, since it uses less digits than its factorization.

78206416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4887909 (or 4887903 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 78206416 is about 8843.4391500140. The cubic root of 78206416 is about 427.6424358087.

The spelling of 78206416 in words is "seventy-eight million, two hundred six thousand, four hundred sixteen".