3990002122 has 4 divisors (see below), whose sum is σ = 5985003186. Its totient is φ = 1995001060.

The previous prime is 3990002117. The next prime is 3990002129. The reversal of 3990002122 is 2212000993.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3989059281 + 942841 = 63159^2 + 971^2 .

It is not an unprimeable number, because it can be changed into a prime (3990002129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997500529 + ... + 997500532.

Almost surely, 2^3990002122 is an apocalyptic number.

3990002122 is a deficient number, since it is larger than the sum of its proper divisors (1995001064).

3990002122 is a wasteful number, since it uses less digits than its factorization.

3990002122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995001063.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 3990002122 is about 63166.4635863050. The cubic root of 3990002122 is about 1586.0773950370.

The spelling of 3990002122 in words is "three billion, nine hundred ninety million, two thousand, one hundred twenty-two".