19882290 has 16 divisors (see below), whose sum is σ = 47717568. Its totient is φ = 5301936.

The previous prime is 19882273. The next prime is 19882337. The reversal of 19882290 is 9228891.

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, 331342 + ... + 331401.

It is an arithmetic number, because the mean of its divisors is an integer number (2982348).

Almost surely, 2^19882290 is an apocalyptic number.

19882290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19882290 is an abundant number, since it is smaller than the sum of its proper divisors (27835278).

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

19882290 is a wasteful number, since it uses less digits than its factorization.

19882290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662753.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 19882290 is about 4458.9561558733. The cubic root of 19882290 is about 270.9081900116.

It can be divided in two parts, 1988 and 2290, that added together give a triangular number (4278 = T₉₂).

The spelling of 19882290 in words is "nineteen million, eight hundred eighty-two thousand, two hundred ninety".