389349720 has 64 divisors (see below), whose sum is σ = 1297836000. Its totient is φ = 103826304.

The previous prime is 389349707. The next prime is 389349733. The reversal of 389349720 is 27943983.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (389349707) and next prime (389349733).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179175 + ... + 181334.

Almost surely, 2^389349720 is an apocalyptic number.

389349720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

389349720 is an abundant number, since it is smaller than the sum of its proper divisors (908486280).

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

389349720 is a wasteful number, since it uses less digits than its factorization.

389349720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360529 (or 360519 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 389349720 is about 19731.9466855148. The cubic root of 389349720 is about 730.2080597913.

The spelling of 389349720 in words is "three hundred eighty-nine million, three hundred forty-nine thousand, seven hundred twenty".