390974438 has 8 divisors (see below), whose sum is σ = 617328120. Its totient is φ = 185198400.

The previous prime is 390974411. The next prime is 390974461. The reversal of 390974438 is 834479093.

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

It is a super-2 number, since 2×390974438² = 305722022338831688, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 390974392 and 390974401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5144363 + ... + 5144438.

It is an arithmetic number, because the mean of its divisors is an integer number (77166015).

Almost surely, 2^390974438 is an apocalyptic number.

390974438 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

390974438 is a deficient number, since it is larger than the sum of its proper divisors (226353682).

390974438 is a wasteful number, since it uses less digits than its factorization.

390974438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10288822.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 390974438 is about 19773.0735597681. The cubic root of 390974438 is about 731.2223456754. Note that the first 3 decimals are identical.

The spelling of 390974438 in words is "three hundred ninety million, nine hundred seventy-four thousand, four hundred thirty-eight".