402581630 has 32 divisors (see below), whose sum is σ = 800547840. Its totient is φ = 144537120.

The previous prime is 402581591. The next prime is 402581651. The reversal of 402581630 is 36185204.

It is a junction number, because it is equal to n+sod(n) for n = 402581593 and 402581602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14474 + ... + 31853.

It is an arithmetic number, because the mean of its divisors is an integer number (25017120).

Almost surely, 2^402581630 is an apocalyptic number.

402581630 is a deficient number, since it is larger than the sum of its proper divisors (397966210).

402581630 is a wasteful number, since it uses less digits than its factorization.

402581630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46424.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 402581630 is about 20064.4369469965. The cubic root of 402581630 is about 738.3880360842.

The spelling of 402581630 in words is "four hundred two million, five hundred eighty-one thousand, six hundred thirty".