400632253 has 4 divisors (see below), whose sum is σ = 457865440. Its totient is φ = 343399068.

The previous prime is 400632229. The next prime is 400632257. The reversal of 400632253 is 352236004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400632253 - 2¹³ = 400624061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400632257) 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 3 ways as a sum of consecutive naturals, for example, 28616583 + ... + 28616596.

It is an arithmetic number, because the mean of its divisors is an integer number (114466360).

Almost surely, 2^400632253 is an apocalyptic number.

It is an amenable number.

400632253 is a deficient number, since it is larger than the sum of its proper divisors (57233187).

400632253 is an equidigital number, since it uses as much as digits as its factorization.

400632253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57233186.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 400632253 is about 20015.8000839337. The cubic root of 400632253 is about 737.1943020313.

Adding to 400632253 its reverse (352236004), we get a palindrome (752868257).

The spelling of 400632253 in words is "four hundred million, six hundred thirty-two thousand, two hundred fifty-three".