78772052 has 6 divisors (see below), whose sum is σ = 137851098. Its totient is φ = 39386024.

The previous prime is 78772007. The next prime is 78772061. The reversal of 78772052 is 25027787.

It can be written as a sum of positive squares in only one way, i.e., 71132356 + 7639696 = 8434^2 + 2764^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78771997 and 78772015.

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, 9846503 + ... + 9846510.

It is an arithmetic number, because the mean of its divisors is an integer number (22975183).

Almost surely, 2^78772052 is an apocalyptic number.

It is an amenable number.

78772052 is a deficient number, since it is larger than the sum of its proper divisors (59079046).

78772052 is a wasteful number, since it uses less digits than its factorization.

78772052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19693017 (or 19693015 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 38.

The square root of 78772052 is about 8875.3620771211. The cubic root of 78772052 is about 428.6709495651.

The spelling of 78772052 in words is "seventy-eight million, seven hundred seventy-two thousand, fifty-two".