400849253 has 6 divisors (see below), whose sum is σ = 466294086. Its totient is φ = 343585032.

The previous prime is 400849249. The next prime is 400849261. The reversal of 400849253 is 352948004.

It can be written as a sum of positive squares in only one way, i.e., 372991969 + 27857284 = 19313^2 + 5278^2 .

It is not a de Polignac number, because 400849253 - 2² = 400849249 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 (400849283) 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 5 ways as a sum of consecutive naturals, for example, 4090250 + ... + 4090347.

It is an arithmetic number, because the mean of its divisors is an integer number (77715681).

Almost surely, 2^400849253 is an apocalyptic number.

It is an amenable number.

400849253 is a deficient number, since it is larger than the sum of its proper divisors (65444833).

400849253 is an equidigital number, since it uses as much as digits as its factorization.

400849253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8180611 (or 8180604 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 400849253 is about 20021.2200677182. The cubic root of 400849253 is about 737.3273769303.

The spelling of 400849253 in words is "four hundred million, eight hundred forty-nine thousand, two hundred fifty-three".