77923398 has 64 divisors (see below), whose sum is σ = 186052608. Its totient is φ = 21288960.

The previous prime is 77923381. The next prime is 77923403. The reversal of 77923398 is 89332977.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125986 + ... + 126602.

It is an arithmetic number, because the mean of its divisors is an integer number (2907072).

Almost surely, 2^77923398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77923398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93026304).

77923398 is an abundant number, since it is smaller than the sum of its proper divisors (108129210).

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

77923398 is a wasteful number, since it uses less digits than its factorization.

77923398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757.

The product of its digits is 571536, while the sum is 48.

The square root of 77923398 is about 8827.4230667846. The cubic root of 77923398 is about 427.1259530409.

The spelling of 77923398 in words is "seventy-seven million, nine hundred twenty-three thousand, three hundred ninety-eight".