235720290 has 32 divisors (see below), whose sum is σ = 609247296. Its totient is φ = 58023360.

The previous prime is 235720259. The next prime is 235720291. The reversal of 235720290 is 92027532.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (235720291) by changing a digit.

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, 301816 + ... + 302595.

It is an arithmetic number, because the mean of its divisors is an integer number (19038978).

Almost surely, 2^235720290 is an apocalyptic number.

235720290 is an abundant number, since it is smaller than the sum of its proper divisors (373527006).

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

235720290 is a wasteful number, since it uses less digits than its factorization.

235720290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604434.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 235720290 is about 15353.1850115864. The cubic root of 235720290 is about 617.7304204358.

The spelling of 235720290 in words is "two hundred thirty-five million, seven hundred twenty thousand, two hundred ninety".