7906988990 has 64 divisors (see below), whose sum is σ = 15254894592. Its totient is φ = 2943494400.

The previous prime is 7906988981. The next prime is 7906989029. The reversal of 7906988990 is 998896097.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4365185 + ... + 4366995.

It is an arithmetic number, because the mean of its divisors is an integer number (238357728).

Almost surely, 2^7906988990 is an apocalyptic number.

7906988990 is a deficient number, since it is larger than the sum of its proper divisors (7347905602).

7906988990 is a wasteful number, since it uses less digits than its factorization.

7906988990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345.

The product of its (nonzero) digits is 17635968, while the sum is 65.

The square root of 7906988990 is about 88921.2516218705. The cubic root of 7906988990 is about 1992.2188486015.

The spelling of 7906988990 in words is "seven billion, nine hundred six million, nine hundred eighty-eight thousand, nine hundred ninety".