77873928 has 64 divisors (see below), whose sum is σ = 214643520. Its totient is φ = 23347200.

The previous prime is 77873911. The next prime is 77873933. The reversal of 77873928 is 82937877.

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, 24088 + ... + 27128.

It is an arithmetic number, because the mean of its divisors is an integer number (3353805).

Almost surely, 2^77873928 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 77873928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107321760).

77873928 is an abundant number, since it is smaller than the sum of its proper divisors (136769592).

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

77873928 is a wasteful number, since it uses less digits than its factorization.

77873928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3158 (or 3154 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 51.

The square root of 77873928 is about 8824.6205584150. The cubic root of 77873928 is about 427.0355463317.

The spelling of 77873928 in words is "seventy-seven million, eight hundred seventy-three thousand, nine hundred twenty-eight".