77425492 has 12 divisors (see below), whose sum is σ = 136358740. Its totient is φ = 38465856.

The previous prime is 77425477. The next prime is 77425501. The reversal of 77425492 is 29452477.

It can be written as a sum of positive squares in 2 ways, for example, as 16679056 + 60746436 = 4084^2 + 7794^2 .

It is a super-2 number, since 2×77425492² = 11989413622884128, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61017 + ... + 62272.

Almost surely, 2^77425492 is an apocalyptic number.

It is an amenable number.

77425492 is a deficient number, since it is larger than the sum of its proper divisors (58933248).

77425492 is a wasteful number, since it uses less digits than its factorization.

77425492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123450 (or 123448 counting only the distinct ones).

The product of its digits is 141120, while the sum is 40.

The square root of 77425492 is about 8799.1756432066. The cubic root of 77425492 is about 426.2142750049.

The spelling of 77425492 in words is "seventy-seven million, four hundred twenty-five thousand, four hundred ninety-two".