423520820 has 24 divisors (see below), whose sum is σ = 892548384. Its totient is φ = 168807456.

The previous prime is 423520819. The next prime is 423520831. The reversal of 423520820 is 28025324.

It is a self number, because there is not a number n which added to its sum of digits gives 423520820.

It is a congruent number.

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, 31754 + ... + 43073.

It is an arithmetic number, because the mean of its divisors is an integer number (37189516).

Almost surely, 2^423520820 is an apocalyptic number.

It is an amenable number.

423520820 is an abundant number, since it is smaller than the sum of its proper divisors (469027564).

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

423520820 is a wasteful number, since it uses less digits than its factorization.

423520820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75119 (or 75117 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 423520820 is about 20579.6214736812. The cubic root of 423520820 is about 750.9740352004.

The spelling of 423520820 in words is "four hundred twenty-three million, five hundred twenty thousand, eight hundred twenty".