421357040 has 80 divisors (see below), whose sum is σ = 1058786400. Its totient is φ = 155022336.

The previous prime is 421357031. The next prime is 421357093. The reversal of 421357040 is 40753124.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 393626 + ... + 394694.

It is an arithmetic number, because the mean of its divisors is an integer number (13234830).

Almost surely, 2^421357040 is an apocalyptic number.

421357040 is a gapful number since it is divisible by the number (40) 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 421357040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (529393200).

421357040 is an abundant number, since it is smaller than the sum of its proper divisors (637429360).

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

421357040 is a wasteful number, since it uses less digits than its factorization.

421357040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1474 (or 1468 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 421357040 is about 20526.9832172192. The cubic root of 421357040 is about 749.6929350394.

The spelling of 421357040 in words is "four hundred twenty-one million, three hundred fifty-seven thousand, forty".