2194581990 has 32 divisors (see below), whose sum is σ = 5395463136. Its totient is φ = 570947840.

The previous prime is 2194581979. The next prime is 2194582021. The reversal of 2194581990 is 991854912.

2194581990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2194581990² = 9632380221664720200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 890877 + ... + 893336.

It is an arithmetic number, because the mean of its divisors is an integer number (168608223).

Almost surely, 2^2194581990 is an apocalyptic number.

2194581990 is an abundant number, since it is smaller than the sum of its proper divisors (3200881146).

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

2194581990 is a wasteful number, since it uses less digits than its factorization.

2194581990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784264.

The product of its (nonzero) digits is 233280, while the sum is 48.

The square root of 2194581990 is about 46846.3658142230. The cubic root of 2194581990 is about 1299.5228998763.

The spelling of 2194581990 in words is "two billion, one hundred ninety-four million, five hundred eighty-one thousand, nine hundred ninety".