77894240 has 24 divisors (see below), whose sum is σ = 184025520. Its totient is φ = 31157632.

The previous prime is 77894239. The next prime is 77894249. The reversal of 77894240 is 4249877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77894249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243260 + ... + 243579.

It is an arithmetic number, because the mean of its divisors is an integer number (7667730).

Almost surely, 2^77894240 is an apocalyptic number.

It is an amenable number.

77894240 is an abundant number, since it is smaller than the sum of its proper divisors (106131280).

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

77894240 is a wasteful number, since it uses less digits than its factorization.

77894240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486854 (or 486846 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 77894240 is about 8825.7713543916. The cubic root of 77894240 is about 427.0726712600.

The spelling of 77894240 in words is "seventy-seven million, eight hundred ninety-four thousand, two hundred forty".