233992890 has 48 divisors (see below), whose sum is σ = 610597728. Its totient is φ = 62170848.

The previous prime is 233992859. The next prime is 233992897. The reversal of 233992890 is 98299332.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (233992897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20877 + ... + 30063.

It is an arithmetic number, because the mean of its divisors is an integer number (12720786).

Almost surely, 2^233992890 is an apocalyptic number.

233992890 is an abundant number, since it is smaller than the sum of its proper divisors (376604838).

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

233992890 is a wasteful number, since it uses less digits than its factorization.

233992890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9483 (or 9480 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 233992890 is about 15296.8261413929. The cubic root of 233992890 is about 616.2177734685.

The spelling of 233992890 in words is "two hundred thirty-three million, nine hundred ninety-two thousand, eight hundred ninety".