389890787 has 8 divisors (see below), whose sum is σ = 458053680. Its totient is φ = 327180960.

The previous prime is 389890759. The next prime is 389890807. The reversal of 389890787 is 787098983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 389890787 - 2⁶ = 389890723 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389890727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1363112 + ... + 1363397.

It is an arithmetic number, because the mean of its divisors is an integer number (57256710).

Almost surely, 2^389890787 is an apocalyptic number.

389890787 is a deficient number, since it is larger than the sum of its proper divisors (68162893).

389890787 is a wasteful number, since it uses less digits than its factorization.

389890787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2726533.

The product of its (nonzero) digits is 6096384, while the sum is 59.

The square root of 389890787 is about 19745.6523569114. The cubic root of 389890787 is about 730.5461522480.

The spelling of 389890787 in words is "three hundred eighty-nine million, eight hundred ninety thousand, seven hundred eighty-seven".