77253644 has 48 divisors (see below), whose sum is σ = 155203776. Its totient is φ = 33331200.

The previous prime is 77253611. The next prime is 77253653. The reversal of 77253644 is 44635277.

It is a super-2 number, since 2×77253644² = 11936251022557472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77253598 and 77253607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248249 + ... + 248559.

It is an arithmetic number, because the mean of its divisors is an integer number (3233412).

Almost surely, 2^77253644 is an apocalyptic number.

It is an amenable number.

77253644 is an abundant number, since it is smaller than the sum of its proper divisors (77950132).

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

77253644 is a wasteful number, since it uses less digits than its factorization.

77253644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626 (or 624 counting only the distinct ones).

The product of its digits is 141120, while the sum is 38.

The square root of 77253644 is about 8789.4052130960. The cubic root of 77253644 is about 425.8987100024.

The spelling of 77253644 in words is "seventy-seven million, two hundred fifty-three thousand, six hundred forty-four".