3990651 has 8 divisors (see below), whose sum is σ = 6081024. Its totient is φ = 2280360.

The previous prime is 3990641. The next prime is 3990689. The reversal of 3990651 is 1560993.

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

It is not a de Polignac number, because 3990651 - 2⁵ = 3990619 is a prime.

3990651 is a lucky number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (3990601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94995 + ... + 95036.

It is an arithmetic number, because the mean of its divisors is an integer number (760128).

Almost surely, 2^3990651 is an apocalyptic number.

3990651 is a deficient number, since it is larger than the sum of its proper divisors (2090373).

3990651 is a wasteful number, since it uses less digits than its factorization.

3990651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190041.

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 3990651 is about 1997.6613827173. The cubic root of 3990651 is about 158.6163369506.

The spelling of 3990651 in words is "three million, nine hundred ninety thousand, six hundred fifty-one".