281166402 has 16 divisors (see below), whose sum is σ = 613454112. Its totient is φ = 85201920.

The previous prime is 281166337. The next prime is 281166439. The reversal of 281166402 is 204661182.

It is a super-2 number, since 2×281166402² = 158109091227251208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 281166402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2129983 + ... + 2130114.

It is an arithmetic number, because the mean of its divisors is an integer number (38340882).

Almost surely, 2^281166402 is an apocalyptic number.

281166402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

281166402 is an abundant number, since it is smaller than the sum of its proper divisors (332287710).

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

281166402 is a wasteful number, since it uses less digits than its factorization.

281166402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4260113.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 281166402 is about 16768.0172352011. The cubic root of 281166402 is about 655.1204269375.

The spelling of 281166402 in words is "two hundred eighty-one million, one hundred sixty-six thousand, four hundred two".