77504648 has 64 divisors (see below), whose sum is σ = 167697600. Its totient is φ = 33281280.

The previous prime is 77504639. The next prime is 77504659. The reversal of 77504648 is 84640577.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120215 + ... + 120857.

It is an arithmetic number, because the mean of its divisors is an integer number (2620275).

Almost surely, 2^77504648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77504648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83848800).

77504648 is an abundant number, since it is smaller than the sum of its proper divisors (90192952).

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

77504648 is a wasteful number, since it uses less digits than its factorization.

77504648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742 (or 738 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 41.

The square root of 77504648 is about 8803.6724155321. The cubic root of 77504648 is about 426.3594723451.

The spelling of 77504648 in words is "seventy-seven million, five hundred four thousand, six hundred forty-eight".