421994109288 has 32 divisors (see below), whose sum is σ = 1056188273760. Its totient is φ = 140504303040.

The previous prime is 421994109259. The next prime is 421994109343. The reversal of 421994109288 is 882901499124.

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, 10003518 + ... + 10045613.

It is an arithmetic number, because the mean of its divisors is an integer number (33005883555).

Almost surely, 2^421994109288 is an apocalyptic number.

It is an amenable number.

421994109288 is an abundant number, since it is smaller than the sum of its proper divisors (634194164472).

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

421994109288 is a wasteful number, since it uses less digits than its factorization.

421994109288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20050017 (or 20050013 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 57.

The spelling of 421994109288 in words is "four hundred twenty-one billion, nine hundred ninety-four million, one hundred nine thousand, two hundred eighty-eight".