78195272 has 8 divisors (see below), whose sum is σ = 146616150. Its totient is φ = 39097632.

The previous prime is 78195269. The next prime is 78195283. The reversal of 78195272 is 27259187.

It can be written as a sum of positive squares in only one way, i.e., 77545636 + 649636 = 8806^2 + 806^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×78195272² = 12229001126307968, 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, 4887197 + ... + 4887212.

Almost surely, 2^78195272 is an apocalyptic number.

It is an amenable number.

78195272 is a deficient number, since it is larger than the sum of its proper divisors (68420878).

78195272 is a wasteful number, since it uses less digits than its factorization.

78195272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9774415 (or 9774411 counting only the distinct ones).

The product of its digits is 70560, while the sum is 41.

The square root of 78195272 is about 8842.8090559505. The cubic root of 78195272 is about 427.6221225833.

The spelling of 78195272 in words is "seventy-eight million, one hundred ninety-five thousand, two hundred seventy-two".