3900840849 has 24 divisors (see below), whose sum is σ = 5877074112. Its totient is φ = 2585500560.

The previous prime is 3900840821. The next prime is 3900840877. The reversal of 3900840849 is 9480480093.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3900840821) and next prime (3900840877).

It is not a de Polignac number, because 3900840849 - 2²⁵ = 3867286417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3900840149) 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 23 ways as a sum of consecutive naturals, for example, 4357 + ... + 88434.

It is an arithmetic number, because the mean of its divisors is an integer number (244878088).

Almost surely, 2^3900840849 is an apocalyptic number.

It is an amenable number.

3900840849 is a deficient number, since it is larger than the sum of its proper divisors (1976233263).

3900840849 is an equidigital number, since it uses as much as digits as its factorization.

3900840849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92979 (or 92967 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 3900840849 is about 62456.7118010547. The cubic root of 3900840849 is about 1574.1740322245.

The spelling of 3900840849 in words is "three billion, nine hundred million, eight hundred forty thousand, eight hundred forty-nine".