68204772 has 18 divisors (see below), whose sum is σ = 172406598. Its totient is φ = 22734912.

The previous prime is 68204761. The next prime is 68204777. The reversal of 68204772 is 27740286.

It can be written as a sum of positive squares in only one way, i.e., 51753636 + 16451136 = 7194^2 + 4056^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1894577 = 68204772 / (6 + 8 + 2 + 0 + 4 + 7 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (68204777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 947253 + ... + 947324.

Almost surely, 2^68204772 is an apocalyptic number.

It is an amenable number.

68204772 is an abundant number, since it is smaller than the sum of its proper divisors (104201826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68204772 is a wasteful number, since it uses less digits than its factorization.

68204772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894587 (or 1894582 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 68204772 is about 8258.6180442009. The cubic root of 68204772 is about 408.5748097543.

The spelling of 68204772 in words is "sixty-eight million, two hundred four thousand, seven hundred seventy-two".