76550640 has 80 divisors (see below), whose sum is σ = 238163328. Its totient is φ = 20339968.

The previous prime is 76550611. The next prime is 76550653. The reversal of 76550640 is 4605567.

It is a tau number, because it is divible by the number of its divisors (80).

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, 111739 + ... + 112421.

Almost surely, 2^76550640 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 76550640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119081664).

76550640 is an abundant number, since it is smaller than the sum of its proper divisors (161612688).

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

76550640 is a wasteful number, since it uses less digits than its factorization.

76550640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166 (or 1160 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 76550640 is about 8749.3222594667. The cubic root of 76550640 is about 424.6028862671.

The spelling of 76550640 in words is "seventy-six million, five hundred fifty thousand, six hundred forty".