235666890 has 24 divisors (see below), whose sum is σ = 612734148. Its totient is φ = 62844480.

The previous prime is 235666889. The next prime is 235666897. The reversal of 235666890 is 98666532.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 235653201 + 13689 = 15351^2 + 117^2 .

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

It is not an unprimeable number, because it can be changed into a prime (235666897) 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 11 ways as a sum of consecutive naturals, for example, 1309171 + ... + 1309350.

Almost surely, 2^235666890 is an apocalyptic number.

235666890 is an abundant number, since it is smaller than the sum of its proper divisors (377067258).

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

235666890 is a wasteful number, since it uses less digits than its factorization.

235666890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618534 (or 2618531 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 235666890 is about 15351.4458602439. The cubic root of 235666890 is about 617.6837700948.

The spelling of 235666890 in words is "two hundred thirty-five million, six hundred sixty-six thousand, eight hundred ninety".