77375640 has 32 divisors (see below), whose sum is σ = 232127280. Its totient is φ = 20633472.

The previous prime is 77375603. The next prime is 77375647. The reversal of 77375640 is 4657377.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77375647) 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 7 ways as a sum of consecutive naturals, for example, 322279 + ... + 322518.

Almost surely, 2^77375640 is an apocalyptic number.

It is an amenable number.

77375640 is an abundant number, since it is smaller than the sum of its proper divisors (154751640).

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

77375640 is a wasteful number, since it uses less digits than its factorization.

77375640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644811 (or 644807 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 39.

The square root of 77375640 is about 8796.3424217114. The cubic root of 77375640 is about 426.1227797477.

The spelling of 77375640 in words is "seventy-seven million, three hundred seventy-five thousand, six hundred forty".