421552992 has 96 divisors (see below), whose sum is σ = 1277385984. Its totient is φ = 119232000.

The previous prime is 421552991. The next prime is 421552997. The reversal of 421552992 is 299255124.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 421552992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421552991) 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, 64767 + ... + 70977.

It is an arithmetic number, because the mean of its divisors is an integer number (13306104).

Almost surely, 2^421552992 is an apocalyptic number.

421552992 is a gapful number since it is divisible by the number (42) 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 421552992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (638692992).

421552992 is an abundant number, since it is smaller than the sum of its proper divisors (855832992).

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

421552992 is a wasteful number, since it uses less digits than its factorization.

421552992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6332 (or 6324 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 421552992 is about 20531.7556969685. The cubic root of 421552992 is about 749.8091318744.

The spelling of 421552992 in words is "four hundred twenty-one million, five hundred fifty-two thousand, nine hundred ninety-two".