7198097890 has 8 divisors (see below), whose sum is σ = 12956576220. Its totient is φ = 2879239152.

The previous prime is 7198097869. The next prime is 7198097909. The reversal of 7198097890 is 987908917.

It can be written as a sum of positive squares in 2 ways, for example, as 6443112361 + 754985529 = 80269^2 + 27477^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×7198097890² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359904885 + ... + 359904904.

Almost surely, 2^7198097890 is an apocalyptic number.

7198097890 is a deficient number, since it is larger than the sum of its proper divisors (5758478330).

7198097890 is a wasteful number, since it uses less digits than its factorization.

7198097890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719809796.

The product of its (nonzero) digits is 2286144, while the sum is 58.

The square root of 7198097890 is about 84841.6047113679. The cubic root of 7198097890 is about 1930.8087109930.

The spelling of 7198097890 in words is "seven billion, one hundred ninety-eight million, ninety-seven thousand, eight hundred ninety".