400263642 has 24 divisors (see below), whose sum is σ = 868611744. Its totient is φ = 133209864.

The previous prime is 400263637. The next prime is 400263649. The reversal of 400263642 is 246362004.

It is not an unprimeable number, because it can be changed into a prime (400263649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5718 + ... + 28865.

It is an arithmetic number, because the mean of its divisors is an integer number (36192156).

Almost surely, 2^400263642 is an apocalyptic number.

400263642 is an abundant number, since it is smaller than the sum of its proper divisors (468348102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400263642 is a wasteful number, since it uses less digits than its factorization.

400263642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35234 (or 35231 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 400263642 is about 20006.5899643093. The cubic root of 400263642 is about 736.9681417484.

The spelling of 400263642 in words is "four hundred million, two hundred sixty-three thousand, six hundred forty-two".