390389193 has 16 divisors (see below), whose sum is σ = 579393600. Its totient is φ = 259791840.

The previous prime is 390389159. The next prime is 390389221. The reversal of 390389193 is 391983093.

It is not a de Polignac number, because 390389193 - 2⁹ = 390388681 is a prime.

It is a super-2 number, since 2×390389193² = 304807444022382498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (390389693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2658 + ... + 28068.

It is an arithmetic number, because the mean of its divisors is an integer number (36212100).

Almost surely, 2^390389193 is an apocalyptic number.

It is an amenable number.

390389193 is a deficient number, since it is larger than the sum of its proper divisors (189004407).

390389193 is a wasteful number, since it uses less digits than its factorization.

390389193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25989 (or 25983 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 390389193 is about 19758.2689778229. The cubic root of 390389193 is about 730.8573107899.

It can be divided in two parts, 3903 and 89193, that added together give a triangular number (93096 = T₄₃₁).

The spelling of 390389193 in words is "three hundred ninety million, three hundred eighty-nine thousand, one hundred ninety-three".