77794480 has 20 divisors (see below), whose sum is σ = 180872352. Its totient is φ = 31117760.

The previous prime is 77794477. The next prime is 77794529. The reversal of 77794480 is 8449777.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×77794480² = 12103962236940800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77794480.

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, 486136 + ... + 486295.

Almost surely, 2^77794480 is an apocalyptic number.

It is an amenable number.

77794480 is an abundant number, since it is smaller than the sum of its proper divisors (103077872).

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

77794480 is a wasteful number, since it uses less digits than its factorization.

77794480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972444 (or 972438 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 77794480 is about 8820.1179130440. The cubic root of 77794480 is about 426.8902745010.

The spelling of 77794480 in words is "seventy-seven million, seven hundred ninety-four thousand, four hundred eighty".