420581940 has 24 divisors (see below), whose sum is σ = 1177629600. Its totient is φ = 112155168.

The previous prime is 420581927. The next prime is 420581951. The reversal of 420581940 is 49185024.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3504790 + ... + 3504909.

It is an arithmetic number, because the mean of its divisors is an integer number (49067900).

Almost surely, 2^420581940 is an apocalyptic number.

It is an amenable number.

420581940 is an abundant number, since it is smaller than the sum of its proper divisors (757047660).

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

420581940 is a wasteful number, since it uses less digits than its factorization.

420581940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7009711 (or 7009709 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 420581940 is about 20508.0944994897. The cubic root of 420581940 is about 749.2329580185.

The spelling of 420581940 in words is "four hundred twenty million, five hundred eighty-one thousand, nine hundred forty".