390887493 has 8 divisors (see below), whose sum is σ = 521320800. Its totient is φ = 260522928.

The previous prime is 390887459. The next prime is 390887527. The reversal of 390887493 is 394788093.

It is an interprime number because it is at equal distance from previous prime (390887459) and next prime (390887527).

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

It is not a de Polignac number, because 390887493 - 2¹⁴ = 390871109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390887293) 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, 1998 + ... + 28031.

It is an arithmetic number, because the mean of its divisors is an integer number (65165100).

Almost surely, 2^390887493 is an apocalyptic number.

It is an amenable number.

390887493 is a deficient number, since it is larger than the sum of its proper divisors (130433307).

390887493 is a wasteful number, since it uses less digits than its factorization.

390887493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34371.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The square root of 390887493 is about 19770.8748668338. The cubic root of 390887493 is about 731.1681385168.

It can be divided in two parts, 390887 and 493, that multiplied together give a palindrome (192707291).

The spelling of 390887493 in words is "three hundred ninety million, eight hundred eighty-seven thousand, four hundred ninety-three".