2197990440 has 96 divisors (see below), whose sum is σ = 7149285000. Its totient is φ = 585653760.

The previous prime is 2197990411. The next prime is 2197990447. The reversal of 2197990440 is 440997912.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1519596324 + 678394116 = 38982^2 + 26046^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (2197990447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 798186 + ... + 800934.

Almost surely, 2^2197990440 is an apocalyptic number.

2197990440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2197990440 is an abundant number, since it is smaller than the sum of its proper divisors (4951294560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2197990440 is a wasteful number, since it uses less digits than its factorization.

2197990440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4987 (or 4980 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 2197990440 is about 46882.7307225166. The cubic root of 2197990440 is about 1300.1953237085.

The spelling of 2197990440 in words is "two billion, one hundred ninety-seven million, nine hundred ninety thousand, four hundred forty".