421760898 has 128 divisors (see below), whose sum is σ = 1076275200. Its totient is φ = 121352256.

The previous prime is 421760887. The next prime is 421760923. The reversal of 421760898 is 898067124.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1373661 + ... + 1373967.

It is an arithmetic number, because the mean of its divisors is an integer number (8408400).

Almost surely, 2^421760898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421760898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (538137600).

421760898 is an abundant number, since it is smaller than the sum of its proper divisors (654514302).

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

421760898 is a wasteful number, since it uses less digits than its factorization.

421760898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 421760898 is about 20536.8181079738. The cubic root of 421760898 is about 749.9323779032.

The spelling of 421760898 in words is "four hundred twenty-one million, seven hundred sixty thousand, eight hundred ninety-eight".