421632516 has 24 divisors (see below), whose sum is σ = 994865760. Its totient is φ = 138964672.

The previous prime is 421632509. The next prime is 421632551. The reversal of 421632516 is 615236124.

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, 196326 + ... + 198461.

It is an arithmetic number, because the mean of its divisors is an integer number (41452740).

Almost surely, 2^421632516 is an apocalyptic number.

It is an amenable number.

421632516 is an abundant number, since it is smaller than the sum of its proper divisors (573233244).

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

421632516 is a wasteful number, since it uses less digits than its factorization.

421632516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394883 (or 394881 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 421632516 is about 20533.6922154784. The cubic root of 421632516 is about 749.8562782383.

The spelling of 421632516 in words is "four hundred twenty-one million, six hundred thirty-two thousand, five hundred sixteen".