19233990 has 32 divisors (see below), whose sum is σ = 51291360. Its totient is φ = 5128992.

The previous prime is 19233983. The next prime is 19234013. The reversal of 19233990 is 9933291.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 35349 + ... + 35888.

It is an arithmetic number, because the mean of its divisors is an integer number (1602855).

Almost surely, 2^19233990 is an apocalyptic number.

19233990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19233990 is an abundant number, since it is smaller than the sum of its proper divisors (32057370).

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

19233990 is a wasteful number, since it uses less digits than its factorization.

19233990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71253 (or 71247 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 19233990 is about 4385.6573053534. The cubic root of 19233990 is about 267.9311009490.

The spelling of 19233990 in words is "nineteen million, two hundred thirty-three thousand, nine hundred ninety".