421538680 has 32 divisors (see below), whose sum is σ = 966362400. Its totient is φ = 165433216.

The previous prime is 421538659. The next prime is 421538717. The reversal of 421538680 is 86835124.

It is a happy number.

It is a super-2 number, since 2×421538680² = 355389717472284800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97300 + ... + 101539.

It is an arithmetic number, because the mean of its divisors is an integer number (30198825).

Almost surely, 2^421538680 is an apocalyptic number.

421538680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421538680 is an abundant number, since it is smaller than the sum of its proper divisors (544823720).

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

421538680 is a wasteful number, since it uses less digits than its factorization.

421538680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198903 (or 198899 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 421538680 is about 20531.4071607379. The cubic root of 421538680 is about 749.8006462747.

The spelling of 421538680 in words is "four hundred twenty-one million, five hundred thirty-eight thousand, six hundred eighty".