421322840 has 32 divisors (see below), whose sum is σ = 948780000. Its totient is φ = 168386304.

The previous prime is 421322833. The next prime is 421322843. The reversal of 421322840 is 48223124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421322843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52196 + ... + 59724.

It is an arithmetic number, because the mean of its divisors is an integer number (29649375).

Almost surely, 2^421322840 is an apocalyptic number.

421322840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421322840 is an abundant number, since it is smaller than the sum of its proper divisors (527457160).

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

421322840 is a wasteful number, since it uses less digits than its factorization.

421322840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8939 (or 8935 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 421322840 is about 20526.1501504788. The cubic root of 421322840 is about 749.6726512186.

Adding to 421322840 its reverse (48223124), we get a palindrome (469545964).

The spelling of 421322840 in words is "four hundred twenty-one million, three hundred twenty-two thousand, eight hundred forty".