402563830 has 64 divisors (see below), whose sum is σ = 807045120. Its totient is φ = 143942400.

The previous prime is 402563813. The next prime is 402563869. The reversal of 402563830 is 38365204.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 402563792 and 402563801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 240657 + ... + 242323.

It is an arithmetic number, because the mean of its divisors is an integer number (12610080).

Almost surely, 2^402563830 is an apocalyptic number.

402563830 is an abundant number, since it is smaller than the sum of its proper divisors (404481290).

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

402563830 is a wasteful number, since it uses less digits than its factorization.

402563830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1765.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 402563830 is about 20063.9933712110. The cubic root of 402563830 is about 738.3771534046.

The spelling of 402563830 in words is "four hundred two million, five hundred sixty-three thousand, eight hundred thirty".