76655440 has 20 divisors (see below), whose sum is σ = 178224084. Its totient is φ = 30662144.

The previous prime is 76655419. The next prime is 76655441. The reversal of 76655440 is 4455667.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 50808384 + 25847056 = 7128^2 + 5084^2 .

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

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 76655440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76655441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479017 + ... + 479176.

Almost surely, 2^76655440 is an apocalyptic number.

It is an amenable number.

76655440 is an abundant number, since it is smaller than the sum of its proper divisors (101568644).

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

76655440 is a wasteful number, since it uses less digits than its factorization.

76655440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958206 (or 958200 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 76655440 is about 8755.3092463944. The cubic root of 76655440 is about 424.7965623809.

The spelling of 76655440 in words is "seventy-six million, six hundred fifty-five thousand, four hundred forty".