400049253 has 32 divisors (see below), whose sum is σ = 642153600. Its totient is φ = 245161728.

The previous prime is 400049249. The next prime is 400049261. The reversal of 400049253 is 352940004.

400049253 is a `hidden beast` number, since 400 + 0 + 4 + 9 + 253 = 666.

It is not a de Polignac number, because 400049253 - 2² = 400049249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400049213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9603 + ... + 29871.

It is an arithmetic number, because the mean of its divisors is an integer number (20067300).

Almost surely, 2^400049253 is an apocalyptic number.

400049253 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

400049253 is a deficient number, since it is larger than the sum of its proper divisors (242104347).

400049253 is a wasteful number, since it uses less digits than its factorization.

400049253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20338 (or 20332 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 400049253 is about 20001.2312870983. The cubic root of 400049253 is about 736.8365400875.

Adding to 400049253 its reverse (352940004), we get a palindrome (752989257).

The spelling of 400049253 in words is "four hundred million, forty-nine thousand, two hundred fifty-three".