2279817890 has 64 divisors (see below), whose sum is σ = 4889237760. Its totient is φ = 748849920.

The previous prime is 2279817889. The next prime is 2279817901. The reversal of 2279817890 is 987189722.

It is a happy number.

It is a super-2 number, since 2×2279817890² = 10395139223128104200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 261644 + ... + 270216.

It is an arithmetic number, because the mean of its divisors is an integer number (76394340).

Almost surely, 2^2279817890 is an apocalyptic number.

2279817890 is an abundant number, since it is smaller than the sum of its proper divisors (2609419870).

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

2279817890 is a wasteful number, since it uses less digits than its factorization.

2279817890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8747.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The square root of 2279817890 is about 47747.4385700427. The cubic root of 2279817890 is about 1316.1338300811.

The spelling of 2279817890 in words is "two billion, two hundred seventy-nine million, eight hundred seventeen thousand, eight hundred ninety".