77440152 has 32 divisors (see below), whose sum is σ = 196256880. Its totient is φ = 25459200.

The previous prime is 77440133. The next prime is 77440157. The reversal of 77440152 is 25104477.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77440157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20349 + ... + 23852.

Almost surely, 2^77440152 is an apocalyptic number.

It is an amenable number.

77440152 is an abundant number, since it is smaller than the sum of its proper divisors (118816728).

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

77440152 is a wasteful number, since it uses less digits than its factorization.

77440152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44283 (or 44279 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 77440152 is about 8800.0086363594. The cubic root of 77440152 is about 426.2411735831.

The spelling of 77440152 in words is "seventy-seven million, four hundred forty thousand, one hundred fifty-two".