253878290 has 8 divisors (see below), whose sum is σ = 456980940. Its totient is φ = 101551312.

The previous prime is 253878283. The next prime is 253878293. The reversal of 253878290 is 92878352.

It can be written as a sum of positive squares in 2 ways, for example, as 244703449 + 9174841 = 15643^2 + 3029^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×253878290² = 128908372266648200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (253878293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12693905 + ... + 12693924.

Almost surely, 2^253878290 is an apocalyptic number.

253878290 is a deficient number, since it is larger than the sum of its proper divisors (203102650).

253878290 is a wasteful number, since it uses less digits than its factorization.

253878290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25387836.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 253878290 is about 15933.5586106808. The cubic root of 253878290 is about 633.2013830989.

The spelling of 253878290 in words is "two hundred fifty-three million, eight hundred seventy-eight thousand, two hundred ninety".