2198390770 has 16 divisors (see below), whose sum is σ = 3960168408. Its totient is φ = 878675200.

The previous prime is 2198390759. The next prime is 2198390771. The reversal of 2198390770 is 770938912.

It is a happy number.

It is a Cunningham number, because it is equal to 46887²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 791465689 + 1406925081 = 28133^2 + 37509^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2198390770.

It is not an unprimeable number, because it can be changed into a prime (2198390771) 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, 71479 + ... + 97498.

Almost surely, 2^2198390770 is an apocalyptic number.

2198390770 is a deficient number, since it is larger than the sum of its proper divisors (1761777638).

2198390770 is a wasteful number, since it uses less digits than its factorization.

2198390770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170285.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 2198390770 is about 46887.0000106639. Note that the first 4 decimals coincide. The cubic root of 2198390770 is about 1300.2742557468.

The spelling of 2198390770 in words is "two billion, one hundred ninety-eight million, three hundred ninety thousand, seven hundred seventy".