233157990 has 64 divisors (see below), whose sum is σ = 611686656. Its totient is φ = 56529792.

The previous prime is 233157983. The next prime is 233158001. The reversal of 233157990 is 99751332.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 21669 + ... + 30591.

It is an arithmetic number, because the mean of its divisors is an integer number (9557604).

Almost surely, 2^233157990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 233157990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305843328).

233157990 is an abundant number, since it is smaller than the sum of its proper divisors (378528666).

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

233157990 is a wasteful number, since it uses less digits than its factorization.

233157990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9013.

The product of its (nonzero) digits is 51030, while the sum is 39.

The square root of 233157990 is about 15269.5117800144. The cubic root of 233157990 is about 615.4839999862.

The spelling of 233157990 in words is "two hundred thirty-three million, one hundred fifty-seven thousand, nine hundred ninety".