390104981 has 8 divisors (see below), whose sum is σ = 450163584. Its totient is φ = 331128720.

The previous prime is 390104971. The next prime is 390104989. The reversal of 390104981 is 189401093.

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

It is a cyclic number.

It is not a de Polignac number, because 390104981 - 2¹⁴ = 390088597 is a prime.

It is a super-2 number, since 2×390104981² = 304363792402020722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390104989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269810 + ... + 271251.

It is an arithmetic number, because the mean of its divisors is an integer number (56270448).

Almost surely, 2^390104981 is an apocalyptic number.

It is an amenable number.

390104981 is a deficient number, since it is larger than the sum of its proper divisors (60058603).

390104981 is a wasteful number, since it uses less digits than its factorization.

390104981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541171.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 390104981 is about 19751.0754390742. The cubic root of 390104981 is about 730.6799076155.

The spelling of 390104981 in words is "three hundred ninety million, one hundred four thousand, nine hundred eighty-one".