77974386 has 48 divisors (see below), whose sum is σ = 182179296. Its totient is φ = 22184064.

The previous prime is 77974361. The next prime is 77974397. The reversal of 77974386 is 68347977.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98685 + ... + 99471.

It is an arithmetic number, because the mean of its divisors is an integer number (3795402).

Almost surely, 2^77974386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77974386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91089648).

77974386 is an abundant number, since it is smaller than the sum of its proper divisors (104204910).

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

77974386 is a wasteful number, since it uses less digits than its factorization.

77974386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143 (or 1136 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 51.

The square root of 77974386 is about 8830.3106400624. The cubic root of 77974386 is about 427.2190938702.

The spelling of 77974386 in words is "seventy-seven million, nine hundred seventy-four thousand, three hundred eighty-six".