421328940 has 24 divisors (see below), whose sum is σ = 1179721200. Its totient is φ = 112354368.

The previous prime is 421328903. The next prime is 421328951. The reversal of 421328940 is 49823124.

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, 3511015 + ... + 3511134.

It is an arithmetic number, because the mean of its divisors is an integer number (49155050).

Almost surely, 2^421328940 is an apocalyptic number.

It is an amenable number.

421328940 is an abundant number, since it is smaller than the sum of its proper divisors (758392260).

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

421328940 is a wasteful number, since it uses less digits than its factorization.

421328940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7022161 (or 7022159 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 421328940 is about 20526.2987408836. The cubic root of 421328940 is about 749.6762691735.

It can be divided in two parts, 4213 and 28940, that added together give a triangular number (33153 = T₂₅₇).

The spelling of 421328940 in words is "four hundred twenty-one million, three hundred twenty-eight thousand, nine hundred forty".