77388432 has 80 divisors (see below), whose sum is σ = 220366848. Its totient is φ = 23207040.

The previous prime is 77388419. The next prime is 77388449. The reversal of 77388432 is 23488377.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53673 + ... + 55095.

Almost surely, 2^77388432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77388432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110183424).

77388432 is an abundant number, since it is smaller than the sum of its proper divisors (142978416).

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

77388432 is a wasteful number, since it uses less digits than its factorization.

77388432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548 (or 1542 counting only the distinct ones).

The product of its digits is 225792, while the sum is 42.

The square root of 77388432 is about 8797.0695120591. The cubic root of 77388432 is about 426.1462611355.

The spelling of 77388432 in words is "seventy-seven million, three hundred eighty-eight thousand, four hundred thirty-two".