402100806 has 8 divisors (see below), whose sum is σ = 804201624. Its totient is φ = 134033600.

The previous prime is 402100723. The next prime is 402100807. The reversal of 402100806 is 608001204.

It is a sphenic number, since it is the product of 3 distinct primes.

402100806 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402100807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33508395 + ... + 33508406.

It is an arithmetic number, because the mean of its divisors is an integer number (100525203).

Almost surely, 2^402100806 is an apocalyptic number.

402100806 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

402100806 is a wasteful number, since it uses less digits than its factorization.

402100806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67016806.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 402100806 is about 20052.4513713411. The cubic root of 402100806 is about 738.0939540051.

The spelling of 402100806 in words is "four hundred two million, one hundred thousand, eight hundred six".