2144578890 has 16 divisors (see below), whose sum is σ = 5146989408. Its totient is φ = 571887696.

The previous prime is 2144578879. The next prime is 2144578901. The reversal of 2144578890 is 988754412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2144578879) and next prime (2144578901).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35742952 + ... + 35743011.

It is an arithmetic number, because the mean of its divisors is an integer number (321686838).

Almost surely, 2^2144578890 is an apocalyptic number.

2144578890 is an abundant number, since it is smaller than the sum of its proper divisors (3002410518).

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

2144578890 is a wasteful number, since it uses less digits than its factorization.

2144578890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71485973.

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 2144578890 is about 46309.5982491751. The cubic root of 2144578890 is about 1289.5771885178.

The spelling of 2144578890 in words is "two billion, one hundred forty-four million, five hundred seventy-eight thousand, eight hundred ninety".