2190338657 has 8 divisors (see below), whose sum is σ = 2359443240. Its totient is φ = 2021322240.

The previous prime is 2190338627. The next prime is 2190338669. The reversal of 2190338657 is 7568330912.

It can be written as a sum of positive squares in 4 ways, for example, as 414896161 + 1775442496 = 20369^2 + 42136^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2190338657 - 2⁸ = 2190338401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2190338627) 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, 35057 + ... + 74897.

It is an arithmetic number, because the mean of its divisors is an integer number (294930405).

Almost surely, 2^2190338657 is an apocalyptic number.

It is an amenable number.

2190338657 is a deficient number, since it is larger than the sum of its proper divisors (169104583).

2190338657 is a wasteful number, since it uses less digits than its factorization.

2190338657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44083.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 2190338657 is about 46801.0540159087. The cubic root of 2190338657 is about 1298.6847955029.

The spelling of 2190338657 in words is "two billion, one hundred ninety million, three hundred thirty-eight thousand, six hundred fifty-seven".