386979840 has 576 divisors, whose sum is σ = 1609826400. Its totient is φ = 84934656.

The previous prime is 386979809. The next prime is 386979863. The reversal of 386979840 is 48979683.

It is a tau number, because it is divible by the number of its divisors (576).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20367351 + ... + 20367369.

Almost surely, 2^386979840 is an apocalyptic number.

386979840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 386979840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804913200).

386979840 is an abundant number, since it is smaller than the sum of its proper divisors (1222846560).

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

386979840 is a wasteful number, since it uses less digits than its factorization.

386979840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 386979840 is about 19671.8031710365. The cubic root of 386979840 is about 728.7235088692.

The spelling of 386979840 in words is "three hundred eighty-six million, nine hundred seventy-nine thousand, eight hundred forty".