402401648 has 20 divisors (see below), whose sum is σ = 850531128. Its totient is φ = 182909760.

The previous prime is 402401647. The next prime is 402401683. The reversal of 402401648 is 846104204.

It is a self number, because there is not a number n which added to its sum of digits gives 402401648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402401647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1143011 + ... + 1143362.

Almost surely, 2^402401648 is an apocalyptic number.

It is an amenable number.

402401648 is an abundant number, since it is smaller than the sum of its proper divisors (448129480).

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

402401648 is a wasteful number, since it uses less digits than its factorization.

402401648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286392 (or 2286386 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 402401648 is about 20059.9513459031. The cubic root of 402401648 is about 738.2779827392.

The spelling of 402401648 in words is "four hundred two million, four hundred one thousand, six hundred forty-eight".