3992406 has 32 divisors (see below), whose sum is σ = 8781696. Its totient is φ = 1200000.

The previous prime is 3992393. The next prime is 3992407. The reversal of 3992406 is 6042993.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3992407) 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, 15781 + ... + 16031.

It is an arithmetic number, because the mean of its divisors is an integer number (274428).

Almost surely, 2^3992406 is an apocalyptic number.

3992406 is an abundant number, since it is smaller than the sum of its proper divisors (4789290).

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

3992406 is a wasteful number, since it uses less digits than its factorization.

3992406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 3992406 is about 1998.1005980681. The cubic root of 3992406 is about 158.6395855279.

The spelling of 3992406 in words is "three million, nine hundred ninety-two thousand, four hundred six".