2190821292 has 36 divisors (see below), whose sum is σ = 6041356776. Its totient is φ = 663885120.

The previous prime is 2190821279. The next prime is 2190821309. The reversal of 2190821292 is 2921280912.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2765793 + ... + 2766584.

It is an arithmetic number, because the mean of its divisors is an integer number (167815466).

Almost surely, 2^2190821292 is an apocalyptic number.

2190821292 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2190821292 is an abundant number, since it is smaller than the sum of its proper divisors (3850535484).

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

2190821292 is a wasteful number, since it uses less digits than its factorization.

2190821292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5532398 (or 5532393 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 2190821292 is about 46806.2099726094. The cubic root of 2190821292 is about 1298.7801756858.

The spelling of 2190821292 in words is "two billion, one hundred ninety million, eight hundred twenty-one thousand, two hundred ninety-two".