77240388 has 12 divisors (see below), whose sum is σ = 180227600. Its totient is φ = 25746792.

The previous prime is 77240363. The next prime is 77240393. The reversal of 77240388 is 88304277.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3218338 + ... + 3218361.

Almost surely, 2^77240388 is an apocalyptic number.

It is an amenable number.

77240388 is an abundant number, since it is smaller than the sum of its proper divisors (102987212).

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

77240388 is a wasteful number, since it uses less digits than its factorization.

77240388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6436706 (or 6436704 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 77240388 is about 8788.6510910378. The cubic root of 77240388 is about 425.8743485356.

The spelling of 77240388 in words is "seventy-seven million, two hundred forty thousand, three hundred eighty-eight".