421890884 has 24 divisors (see below), whose sum is σ = 757743168. Its totient is φ = 205460640.

The previous prime is 421890857. The next prime is 421890899. The reversal of 421890884 is 488098124.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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, 16739 + ... + 33525.

It is an arithmetic number, because the mean of its divisors is an integer number (31572632).

Almost surely, 2^421890884 is an apocalyptic number.

It is an amenable number.

421890884 is a deficient number, since it is larger than the sum of its proper divisors (335852284).

421890884 is a wasteful number, since it uses less digits than its factorization.

421890884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16955 (or 16953 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 44.

The square root of 421890884 is about 20539.9825705866. The cubic root of 421890884 is about 750.0094126226.

The spelling of 421890884 in words is "four hundred twenty-one million, eight hundred ninety thousand, eight hundred eighty-four".