3904021381 has 16 divisors (see below), whose sum is σ = 4231821888. Its totient is φ = 3580214400.

The previous prime is 3904021351. The next prime is 3904021391. The reversal of 3904021381 is 1831204093.

It is a cyclic number.

It is not a de Polignac number, because 3904021381 - 2⁵ = 3904021349 is a prime.

It is a super-2 number, since 2×3904021381² = 30482765886610294322, 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 (3904021351) 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, 2267601 + ... + 2269321.

It is an arithmetic number, because the mean of its divisors is an integer number (264488868).

Almost surely, 2^3904021381 is an apocalyptic number.

It is an amenable number.

3904021381 is a deficient number, since it is larger than the sum of its proper divisors (327800507).

3904021381 is a wasteful number, since it uses less digits than its factorization.

3904021381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2772.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 3904021381 is about 62482.1685043021. The cubic root of 3904021381 is about 1574.6017477659.

The spelling of 3904021381 in words is "three billion, nine hundred four million, twenty-one thousand, three hundred eighty-one".