387890715 has 8 divisors (see below), whose sum is σ = 620625168. Its totient is φ = 206875040.

The previous prime is 387890677. The next prime is 387890743. The reversal of 387890715 is 517098783.

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

It is not a de Polignac number, because 387890715 - 2¹² = 387886619 is a prime.

It is a super-2 number, since 2×387890715² = 300918413566422450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12929676 + ... + 12929705.

It is an arithmetic number, because the mean of its divisors is an integer number (77578146).

Almost surely, 2^387890715 is an apocalyptic number.

387890715 is a deficient number, since it is larger than the sum of its proper divisors (232734453).

387890715 is a wasteful number, since it uses less digits than its factorization.

387890715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25859389.

The product of its (nonzero) digits is 423360, while the sum is 48.

The square root of 387890715 is about 19694.9413555867. The cubic root of 387890715 is about 729.2948184809.

The spelling of 387890715 in words is "three hundred eighty-seven million, eight hundred ninety thousand, seven hundred fifteen".