400261263 has 16 divisors (see below), whose sum is σ = 542063616. Its totient is φ = 262664640.

The previous prime is 400261241. The next prime is 400261273. The reversal of 400261263 is 362162004.

It is not a de Polignac number, because 400261263 - 2⁵ = 400261231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400261223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131428 + ... + 134438.

It is an arithmetic number, because the mean of its divisors is an integer number (33878976).

Almost surely, 2^400261263 is an apocalyptic number.

400261263 is a deficient number, since it is larger than the sum of its proper divisors (141802353).

400261263 is a wasteful number, since it uses less digits than its factorization.

400261263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3694.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 400261263 is about 20006.5305088114. The cubic root of 400261263 is about 736.9666816685.

The spelling of 400261263 in words is "four hundred million, two hundred sixty-one thousand, two hundred sixty-three".