77480646 has 16 divisors (see below), whose sum is σ = 155460144. Its totient is φ = 25743744.

The previous prime is 77480639. The next prime is 77480653. The reversal of 77480646 is 64608477.

It is an interprime number because it is at equal distance from previous prime (77480639) and next prime (77480653).

It is a junction number, because it is equal to n+sod(n) for n = 77480598 and 77480607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18751 + ... + 22506.

It is an arithmetic number, because the mean of its divisors is an integer number (9716259).

Almost surely, 2^77480646 is an apocalyptic number.

77480646 is an abundant number, since it is smaller than the sum of its proper divisors (77979498).

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

77480646 is a wasteful number, since it uses less digits than its factorization.

77480646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41575.

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 77480646 is about 8802.3091288593. The cubic root of 77480646 is about 426.3154554727.

The spelling of 77480646 in words is "seventy-seven million, four hundred eighty thousand, six hundred forty-six".