3991498 has 32 divisors (see below), whose sum is σ = 7492608. Its totient is φ = 1555200.

The previous prime is 3991469. The next prime is 3991511. The reversal of 3991498 is 8941993.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7108 + ... + 7648.

It is an arithmetic number, because the mean of its divisors is an integer number (234144).

Almost surely, 2^3991498 is an apocalyptic number.

3991498 is a deficient number, since it is larger than the sum of its proper divisors (3501110).

3991498 is a wasteful number, since it uses less digits than its factorization.

3991498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598.

The product of its digits is 69984, while the sum is 43.

The square root of 3991498 is about 1997.8733693605. The cubic root of 3991498 is about 158.6275580549.

It can be divided in two parts, 3991 and 498, that added together give a square (4489 = 67²).

The spelling of 3991498 in words is "three million, nine hundred ninety-one thousand, four hundred ninety-eight".