77520048 has 20 divisors (see below), whose sum is σ = 200260248. Its totient is φ = 25840000.

The previous prime is 77520031. The next prime is 77520059. The reversal of 77520048 is 84002577.

It is a super-4 number, since 4×77520048⁴ (a number of 33 digits) contains 4444 as substring.

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, 807453 + ... + 807548.

Almost surely, 2^77520048 is an apocalyptic number.

It is an amenable number.

77520048 is an abundant number, since it is smaller than the sum of its proper divisors (122740200).

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

77520048 is a wasteful number, since it uses less digits than its factorization.

77520048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615012 (or 1615006 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 77520048 is about 8804.5470070867. The cubic root of 77520048 is about 426.3877093658.

The spelling of 77520048 in words is "seventy-seven million, five hundred twenty thousand, forty-eight".