7408900690 has 16 divisors (see below), whose sum is σ = 13339387800. Its totient is φ = 2962812160.

The previous prime is 7408900651. The next prime is 7408900699. The reversal of 7408900690 is 960098047.

It can be written as a sum of positive squares in 4 ways, for example, as 3034797921 + 4374102769 = 55089^2 + 66137^2 .

It is a super-2 number, since 2×7408900690² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7408900699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51001 + ... + 131980.

Almost surely, 2^7408900690 is an apocalyptic number.

7408900690 is a deficient number, since it is larger than the sum of its proper divisors (5930487110).

7408900690 is a wasteful number, since it uses less digits than its factorization.

7408900690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187037.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 7408900690 is about 86074.9713331349. The cubic root of 7408900690 is about 1949.4761415509.

The spelling of 7408900690 in words is "seven billion, four hundred eight million, nine hundred thousand, six hundred ninety".