78204772 has 12 divisors (see below), whose sum is σ = 136984176. Its totient is φ = 39066440.

The previous prime is 78204769. The next prime is 78204781. The reversal of 78204772 is 27740287.

It is a super-2 number, since 2×78204772² = 12231972727143968, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3754 + ... + 13057.

It is an arithmetic number, because the mean of its divisors is an integer number (11415348).

Almost surely, 2^78204772 is an apocalyptic number.

It is an amenable number.

78204772 is a deficient number, since it is larger than the sum of its proper divisors (58779404).

78204772 is a wasteful number, since it uses less digits than its factorization.

78204772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17978 (or 17976 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 78204772 is about 8843.3461992619. The cubic root of 78204772 is about 427.6394392554.

The spelling of 78204772 in words is "seventy-eight million, two hundred four thousand, seven hundred seventy-two".