386433880 has 64 divisors (see below), whose sum is σ = 999901440. Its totient is φ = 131663232.

The previous prime is 386433877. The next prime is 386433907. The reversal of 386433880 is 88334683.

It is a super-2 number, since 2×386433880² = 298662287223708800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41407 + ... + 49873.

It is an arithmetic number, because the mean of its divisors is an integer number (15623460).

Almost surely, 2^386433880 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 386433880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (499950720).

386433880 is an abundant number, since it is smaller than the sum of its proper divisors (613467560).

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

386433880 is a wasteful number, since it uses less digits than its factorization.

386433880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8648 (or 8644 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 43.

The square root of 386433880 is about 19657.9215584965. The cubic root of 386433880 is about 728.3806476543.

The spelling of 386433880 in words is "three hundred eighty-six million, four hundred thirty-three thousand, eight hundred eighty".