3992690 has 16 divisors (see below), whose sum is σ = 7739928. Its totient is φ = 1474176.

The previous prime is 3992689. The next prime is 3992699. The reversal of 3992690 is 962993.

It can be written as a sum of positive squares in 4 ways, for example, as 3308761 + 683929 = 1819^2 + 827^2 .

It is a super-2 number, since 2×3992690² = 31883146872200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3992699) 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 7 ways as a sum of consecutive naturals, for example, 15227 + ... + 15486.

Almost surely, 2^3992690 is an apocalyptic number.

3992690 is a deficient number, since it is larger than the sum of its proper divisors (3747238).

3992690 is a wasteful number, since it uses less digits than its factorization.

3992690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30733.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 3992690 is about 1998.1716642971. The cubic root of 3992690 is about 158.6433470503.

It can be divided in two parts, 39 and 92690, that added together give a palindrome (92729).

The spelling of 3992690 in words is "three million, nine hundred ninety-two thousand, six hundred ninety".