2239691940 has 72 divisors (see below), whose sum is σ = 6938305920. Its totient is φ = 584541504.

The previous prime is 2239691939. The next prime is 2239691963. The reversal of 2239691940 is 491969322.

It is a happy number.

It is a super-2 number, since 2×2239691940² = 10032439972201927200, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123910 + ... + 140829.

It is an arithmetic number, because the mean of its divisors is an integer number (96365360).

Almost surely, 2^2239691940 is an apocalyptic number.

2239691940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2239691940 is an abundant number, since it is smaller than the sum of its proper divisors (4698613980).

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

2239691940 is a wasteful number, since it uses less digits than its factorization.

2239691940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264801 (or 264796 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 2239691940 is about 47325.3836751484. The cubic root of 2239691940 is about 1308.3665400942.

The spelling of 2239691940 in words is "two billion, two hundred thirty-nine million, six hundred ninety-one thousand, nine hundred forty".