3967990 has 32 divisors (see below), whose sum is σ = 7783776. Its totient is φ = 1447680.

The previous prime is 3967973. The next prime is 3967993. The reversal of 3967990 is 997693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3967993) 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, 16914 + ... + 17146.

It is an arithmetic number, because the mean of its divisors is an integer number (243243).

Almost surely, 2^3967990 is an apocalyptic number.

3967990 is a deficient number, since it is larger than the sum of its proper divisors (3815786).

3967990 is a wasteful number, since it uses less digits than its factorization.

3967990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384.

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 3967990 is about 1991.9814256162. The cubic root of 3967990 is about 158.3155313934.

The spelling of 3967990 in words is "three million, nine hundred sixty-seven thousand, nine hundred ninety".