421676928 has 112 divisors (see below), whose sum is σ = 1259791800. Its totient is φ = 140527872.

The previous prime is 421676869. The next prime is 421676929. The reversal of 421676928 is 829676124.

It is a happy number.

It is a super-2 number, since 2×421676928² = 355622863215034368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421676929) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 91053 + ... + 95571.

Almost surely, 2^421676928 is an apocalyptic number.

421676928 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421676928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (629895900).

421676928 is an abundant number, since it is smaller than the sum of its proper divisors (838114872).

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

421676928 is an frugal number, since it uses more digits than its factorization.

421676928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4551 (or 4524 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 421676928 is about 20534.7736291394. The cubic root of 421676928 is about 749.8826056257.

The spelling of 421676928 in words is "four hundred twenty-one million, six hundred seventy-six thousand, nine hundred twenty-eight".