19894490 has 48 divisors (see below), whose sum is σ = 45455904. Its totient is φ = 6199200.

The previous prime is 19894487. The next prime is 19894549. The reversal of 19894490 is 9449891.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3545 + ... + 7235.

It is an arithmetic number, because the mean of its divisors is an integer number (946998).

Almost surely, 2^19894490 is an apocalyptic number.

19894490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19894490 is an abundant number, since it is smaller than the sum of its proper divisors (25561414).

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

19894490 is a wasteful number, since it uses less digits than its factorization.

19894490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3723 (or 3716 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 19894490 is about 4460.3239792643. The cubic root of 19894490 is about 270.9635894674.

The spelling of 19894490 in words is "nineteen million, eight hundred ninety-four thousand, four hundred ninety".