421440588 has 36 divisors (see below), whose sum is σ = 1066473408. Its totient is φ = 140326560.

The previous prime is 421440583. The next prime is 421440601. The reversal of 421440588 is 885044124.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×421440588² = 355224338427571488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (421440583) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29770 + ... + 41582.

Almost surely, 2^421440588 is an apocalyptic number.

It is an amenable number.

421440588 is an abundant number, since it is smaller than the sum of its proper divisors (645032820).

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

421440588 is a wasteful number, since it uses less digits than its factorization.

421440588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12814 (or 12809 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 36.

The square root of 421440588 is about 20529.0181937666. The cubic root of 421440588 is about 749.7424822563.

The spelling of 421440588 in words is "four hundred twenty-one million, four hundred forty thousand, five hundred eighty-eight".