390124397 has 24 divisors (see below), whose sum is σ = 448504056. Its totient is φ = 337250304.

The previous prime is 390124387. The next prime is 390124403. The reversal of 390124397 is 793421093.

It can be written as a sum of positive squares in 4 ways, for example, as 67059721 + 323064676 = 8189^2 + 17974^2 .

It is not a de Polignac number, because 390124397 - 2⁶ = 390124333 is a prime.

It is a super-2 number, since 2×390124397² = 304394090269227218, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 390124397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390124387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 454793 + ... + 455649.

It is an arithmetic number, because the mean of its divisors is an integer number (18687669).

Almost surely, 2^390124397 is an apocalyptic number.

It is an amenable number.

390124397 is a deficient number, since it is larger than the sum of its proper divisors (58379659).

390124397 is a wasteful number, since it uses less digits than its factorization.

390124397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005 (or 986 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 390124397 is about 19751.5669504979. The cubic root of 390124397 is about 730.6920296906.

The spelling of 390124397 in words is "three hundred ninety million, one hundred twenty-four thousand, three hundred ninety-seven".