402401684 has 12 divisors (see below), whose sum is σ = 741266400. Its totient is φ = 190611288.

The previous prime is 402401683. The next prime is 402401693. The reversal of 402401684 is 486104204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402401683) 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, 2647304 + ... + 2647455.

It is an arithmetic number, because the mean of its divisors is an integer number (61772200).

Almost surely, 2^402401684 is an apocalyptic number.

It is an amenable number.

402401684 is a deficient number, since it is larger than the sum of its proper divisors (338864716).

402401684 is a wasteful number, since it uses less digits than its factorization.

402401684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5294782 (or 5294780 counting only the distinct ones).

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

The square root of 402401684 is about 20059.9522432133. The cubic root of 402401684 is about 738.2780047553.

Adding to 402401684 its reverse (486104204), we get a palindrome (888505888).

The spelling of 402401684 in words is "four hundred two million, four hundred one thousand, six hundred eighty-four".