7990155 has 24 divisors (see below), whose sum is σ = 13916448. Its totient is φ = 4240896.

The previous prime is 7990111. The next prime is 7990163. The reversal of 7990155 is 5510997.

It is a happy number.

It is not a de Polignac number, because 7990155 - 2⁶ = 7990091 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15634 + ... + 16136.

It is an arithmetic number, because the mean of its divisors is an integer number (579852).

Almost surely, 2^7990155 is an apocalyptic number.

7990155 is a deficient number, since it is larger than the sum of its proper divisors (5926293).

7990155 is a wasteful number, since it uses less digits than its factorization.

7990155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867 (or 864 counting only the distinct ones).

The product of its (nonzero) digits is 14175, while the sum is 36.

The square root of 7990155 is about 2826.6862224166. The cubic root of 7990155 is about 199.9179246561.

The spelling of 7990155 in words is "seven million, nine hundred ninety thousand, one hundred fifty-five".