389647890 has 24 divisors (see below), whose sum is σ = 1013084748. Its totient is φ = 103906080.

The previous prime is 389647879. The next prime is 389647901. The reversal of 389647890 is 98746983.

389647890 is a `hidden beast` number, since 3 + 89 + 6 + 478 + 90 = 666.

It is an interprime number because it is at equal distance from previous prime (389647879) and next prime (389647901).

It can be written as a sum of positive squares in 2 ways, for example, as 371063169 + 18584721 = 19263^2 + 4311^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2164621 + ... + 2164800.

Almost surely, 2^389647890 is an apocalyptic number.

389647890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

389647890 is an abundant number, since it is smaller than the sum of its proper divisors (623436858).

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

389647890 is a wasteful number, since it uses less digits than its factorization.

389647890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4329434 (or 4329431 counting only the distinct ones).

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

The square root of 389647890 is about 19739.5007535652. The cubic root of 389647890 is about 730.3944137471.

The spelling of 389647890 in words is "three hundred eighty-nine million, six hundred forty-seven thousand, eight hundred ninety".