389308788 has 144 divisors (see below), whose sum is σ = 1146396160. Its totient is φ = 114166800.

The previous prime is 389308763. The next prime is 389308811. The reversal of 389308788 is 887803983.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a super-2 number, since 2×389308788² = 303122664828057888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 12558333 + ... + 12558363.

Almost surely, 2^389308788 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 389308788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (573198080).

389308788 is an abundant number, since it is smaller than the sum of its proper divisors (757087372).

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

389308788 is a wasteful number, since it uses less digits than its factorization.

389308788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The square root of 389308788 is about 19730.9094569916. The cubic root of 389308788 is about 730.1824701802.

The spelling of 389308788 in words is "three hundred eighty-nine million, three hundred eight thousand, seven hundred eighty-eight".