401840253 has 24 divisors (see below), whose sum is σ = 619374080. Its totient is φ = 250309440.

The previous prime is 401840249. The next prime is 401840279. The reversal of 401840253 is 352048104.

401840253 is a `hidden beast` number, since 401 + 8 + 4 + 0 + 253 = 666.

It is not a de Polignac number, because 401840253 - 2² = 401840249 is a prime.

It is a super-2 number, since 2×401840253² = 322951177862208018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401840233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3613 + ... + 28578.

Almost surely, 2^401840253 is an apocalyptic number.

It is an amenable number.

401840253 is a deficient number, since it is larger than the sum of its proper divisors (217533827).

401840253 is a wasteful number, since it uses less digits than its factorization.

401840253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32289 (or 32286 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 401840253 is about 20045.9535318228. The cubic root of 401840253 is about 737.9344963564.

Adding to 401840253 its reverse (352048104), we get a palindrome (753888357).

The spelling of 401840253 in words is "four hundred one million, eight hundred forty thousand, two hundred fifty-three".