421747760 has 80 divisors (see below), whose sum is σ = 1123428096. Its totient is φ = 144240384.

The previous prime is 421747751. The next prime is 421747801. The reversal of 421747760 is 67747124.

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

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, 328079 + ... + 329361.

Almost surely, 2^421747760 is an apocalyptic number.

421747760 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 421747760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (561714048).

421747760 is an abundant number, since it is smaller than the sum of its proper divisors (701680336).

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

421747760 is a wasteful number, since it uses less digits than its factorization.

421747760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890 (or 1884 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 421747760 is about 20536.4982409368. The cubic root of 421747760 is about 749.9245909367.

The spelling of 421747760 in words is "four hundred twenty-one million, seven hundred forty-seven thousand, seven hundred sixty".