78416722 has 4 divisors (see below), whose sum is σ = 117625086. Its totient is φ = 39208360.

The previous prime is 78416719. The next prime is 78416747. The reversal of 78416722 is 22761487.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 67387681 + 11029041 = 8209^2 + 3321^2 .

It is a super-2 number, since 2×78416722² = 12298364578450568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19604179 + ... + 19604182.

Almost surely, 2^78416722 is an apocalyptic number.

78416722 is a deficient number, since it is larger than the sum of its proper divisors (39208364).

78416722 is a wasteful number, since it uses less digits than its factorization.

78416722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39208363.

The product of its digits is 37632, while the sum is 37.

The square root of 78416722 is about 8855.3216768224. The cubic root of 78416722 is about 428.0254191966.

The spelling of 78416722 in words is "seventy-eight million, four hundred sixteen thousand, seven hundred twenty-two".