77294772 has 18 divisors (see below), whose sum is σ = 195384098. Its totient is φ = 25764912.

The previous prime is 77294759. The next prime is 77294797. The reversal of 77294772 is 27749277.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 45077796 + 32216976 = 6714^2 + 5676^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1073503 + ... + 1073574.

Almost surely, 2^77294772 is an apocalyptic number.

It is an amenable number.

77294772 is an abundant number, since it is smaller than the sum of its proper divisors (118089326).

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

77294772 is a wasteful number, since it uses less digits than its factorization.

77294772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147087 (or 2147082 counting only the distinct ones).

The product of its digits is 345744, while the sum is 45.

The square root of 77294772 is about 8791.7445367799. The cubic root of 77294772 is about 425.9742760371.

It can be divided in two parts, 77 and 294772, that added together give a square (294849 = 543²).

The spelling of 77294772 in words is "seventy-seven million, two hundred ninety-four thousand, seven hundred seventy-two".