78016172 has 36 divisors (see below), whose sum is σ = 149911776. Its totient is φ = 35315040.

The previous prime is 78016139. The next prime is 78016199. The reversal of 78016172 is 27161087.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180797 + ... + 181227.

It is an arithmetic number, because the mean of its divisors is an integer number (4164216).

Almost surely, 2^78016172 is an apocalyptic number.

It is an amenable number.

78016172 is a deficient number, since it is larger than the sum of its proper divisors (71895604).

78016172 is a wasteful number, since it uses less digits than its factorization.

78016172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 505 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 78016172 is about 8832.6763780861. The cubic root of 78016172 is about 427.2953949481.

The spelling of 78016172 in words is "seventy-eight million, sixteen thousand, one hundred seventy-two".