77448380 has 24 divisors (see below), whose sum is σ = 163030560. Its totient is φ = 30905280.

The previous prime is 77448347. The next prime is 77448409. The reversal of 77448380 is 8384477.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4370 + ... + 13190.

It is an arithmetic number, because the mean of its divisors is an integer number (6792940).

Almost surely, 2^77448380 is an apocalyptic number.

It is an amenable number.

77448380 is an abundant number, since it is smaller than the sum of its proper divisors (85582180).

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

77448380 is a wasteful number, since it uses less digits than its factorization.

77448380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9269 (or 9267 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 41.

The square root of 77448380 is about 8800.4761234833. The cubic root of 77448380 is about 426.2562690604.

The spelling of 77448380 in words is "seventy-seven million, four hundred forty-eight thousand, three hundred eighty".