421091826 has 16 divisors (see below), whose sum is σ = 850523328. Its totient is φ = 138974000.

The previous prime is 421091821. The next prime is 421091833. The reversal of 421091826 is 628190124.

It is not an unprimeable number, because it can be changed into a prime (421091821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346830 + ... + 348041.

It is an arithmetic number, because the mean of its divisors is an integer number (53157708).

Almost surely, 2^421091826 is an apocalyptic number.

421091826 is an abundant number, since it is smaller than the sum of its proper divisors (429431502).

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

421091826 is a wasteful number, since it uses less digits than its factorization.

421091826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694977.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 421091826 is about 20520.5220693822. The cubic root of 421091826 is about 749.5356094034.

The spelling of 421091826 in words is "four hundred twenty-one million, ninety-one thousand, eight hundred twenty-six".