77412480 has 128 divisors (see below), whose sum is σ = 257627520. Its totient is φ = 19734528.

The previous prime is 77412463. The next prime is 77412521. The reversal of 77412480 is 8421477.

It is a tau number, because it is divible by the number of its divisors (128).

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, 43284 + ... + 45036.

It is an arithmetic number, because the mean of its divisors is an integer number (2012715).

Almost surely, 2^77412480 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 77412480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128813760).

77412480 is an abundant number, since it is smaller than the sum of its proper divisors (180215040).

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

77412480 is a wasteful number, since it uses less digits than its factorization.

77412480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798 (or 1786 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 77412480 is about 8798.4362246936. The cubic root of 77412480 is about 426.1903973787.

The spelling of 77412480 in words is "seventy-seven million, four hundred twelve thousand, four hundred eighty".