420656880 has 160 divisors (see below), whose sum is σ = 1496761344. Its totient is φ = 95735808.

The previous prime is 420656869. The next prime is 420656881. The reversal of 420656880 is 88656024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420656881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 565789 + ... + 566531.

Almost surely, 2^420656880 is an apocalyptic number.

420656880 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 420656880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (748380672).

420656880 is an abundant number, since it is smaller than the sum of its proper divisors (1076104464).

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

420656880 is a wasteful number, since it uses less digits than its factorization.

420656880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 420656880 is about 20509.9215015563. The cubic root of 420656880 is about 749.2774552401.

The spelling of 420656880 in words is "four hundred twenty million, six hundred fifty-six thousand, eight hundred eighty".