77623040 has 144 divisors (see below), whose sum is σ = 209714400. Its totient is φ = 27279360.

The previous prime is 77623031. The next prime is 77623057. The reversal of 77623040 is 4032677.

It is a junction number, because it is equal to n+sod(n) for n = 77622994 and 77623012.

It is a congruent number.

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, 520886 + ... + 521034.

It is an arithmetic number, because the mean of its divisors is an integer number (1456350).

Almost surely, 2^77623040 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 77623040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104857200).

77623040 is an abundant number, since it is smaller than the sum of its proper divisors (132091360).

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

77623040 is a wasteful number, since it uses less digits than its factorization.

77623040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 77623040 is about 8810.3938617976. The cubic root of 77623040 is about 426.5764566227.

The spelling of 77623040 in words is "seventy-seven million, six hundred twenty-three thousand, forty".