2238863691 has 4 divisors (see below), whose sum is σ = 2985151592. Its totient is φ = 1492575792.

The previous prime is 2238863639. The next prime is 2238863701. The reversal of 2238863691 is 1963688322.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2238863691 - 2¹³ = 2238855499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2238863691.

It is not an unprimeable number, because it can be changed into a prime (2238865691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373143946 + ... + 373143951.

It is an arithmetic number, because the mean of its divisors is an integer number (746287898).

Almost surely, 2^2238863691 is an apocalyptic number.

2238863691 is a deficient number, since it is larger than the sum of its proper divisors (746287901).

2238863691 is an equidigital number, since it uses as much as digits as its factorization.

2238863691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746287900.

The product of its digits is 746496, while the sum is 48.

The square root of 2238863691 is about 47316.6322871778. The cubic root of 2238863691 is about 1308.2052401007.

The spelling of 2238863691 in words is "two billion, two hundred thirty-eight million, eight hundred sixty-three thousand, six hundred ninety-one".