77264442 has 40 divisors (see below), whose sum is σ = 173634516. Its totient is φ = 25679808.

The previous prime is 77264419. The next prime is 77264443. The reversal of 77264442 is 24446277.

It is a happy number.

77264442 is a `hidden beast` number, since 7 + 7 + 2 + 644 + 4 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 54597321 + 22667121 = 7389^2 + 4761^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 77264397 and 77264406.

It is not an unprimeable number, because it can be changed into a prime (77264443) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 99568 + ... + 100340.

Almost surely, 2^77264442 is an apocalyptic number.

77264442 is an abundant number, since it is smaller than the sum of its proper divisors (96370074).

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

77264442 is a wasteful number, since it uses less digits than its factorization.

77264442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404 (or 1395 counting only the distinct ones).

The product of its digits is 75264, while the sum is 36.

The square root of 77264442 is about 8790.0194539034. The cubic root of 77264442 is about 425.9185521733.

The spelling of 77264442 in words is "seventy-seven million, two hundred sixty-four thousand, four hundred forty-two".