264196890 has 56 divisors (see below), whose sum is σ = 713025108. Its totient is φ = 70450560.

The previous prime is 264196861. The next prime is 264196903. The reversal of 264196890 is 98691462.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 219721329 + 44475561 = 14823^2 + 6669^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 10831 + ... + 25410.

Almost surely, 2^264196890 is an apocalyptic number.

264196890 is an abundant number, since it is smaller than the sum of its proper divisors (448828218).

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

264196890 is an equidigital number, since it uses as much as digits as its factorization.

264196890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36266 (or 36251 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 264196890 is about 16254.1345509381. The cubic root of 264196890 is about 641.6663040046. Note that the first 3 decimals are identical.

The spelling of 264196890 in words is "two hundred sixty-four million, one hundred ninety-six thousand, eight hundred ninety".