421402488 has 64 divisors (see below), whose sum is σ = 1138989600. Its totient is φ = 129154560.

The previous prime is 421402459. The next prime is 421402489. The reversal of 421402488 is 884204124.

It is a super-3 number, since 3×421402488³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421402489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81418 + ... + 86438.

Almost surely, 2^421402488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421402488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (569494800).

421402488 is an abundant number, since it is smaller than the sum of its proper divisors (717587112).

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

421402488 is a wasteful number, since it uses less digits than its factorization.

421402488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5312 (or 5308 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 33.

The square root of 421402488 is about 20528.0902180403. The cubic root of 421402488 is about 749.7198882851.

The spelling of 421402488 in words is "four hundred twenty-one million, four hundred two thousand, four hundred eighty-eight".