3999654 has 24 divisors (see below), whose sum is σ = 9043632. Its totient is φ = 1275120.

The previous prime is 3999647. The next prime is 3999659. The reversal of 3999654 is 4569993.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4417 + ... + 5244.

It is an arithmetic number, because the mean of its divisors is an integer number (376818).

Almost surely, 2^3999654 is an apocalyptic number.

3999654 is an abundant number, since it is smaller than the sum of its proper divisors (5043978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3999654 is a wasteful number, since it uses less digits than its factorization.

3999654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9692 (or 9689 counting only the distinct ones).

The product of its digits is 262440, while the sum is 45.

The square root of 3999654 is about 1999.9134981294. The cubic root of 3999654 is about 158.7355280585.

The spelling of 3999654 in words is "three million, nine hundred ninety-nine thousand, six hundred fifty-four".