420765020 has 24 divisors (see below), whose sum is σ = 951576864. Its totient is φ = 155359296.

The previous prime is 420764989. The next prime is 420765029. The reversal of 420765020 is 20567024.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420765029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 808904 + ... + 809423.

It is an arithmetic number, because the mean of its divisors is an integer number (39649036).

Almost surely, 2^420765020 is an apocalyptic number.

It is an amenable number.

420765020 is an abundant number, since it is smaller than the sum of its proper divisors (530811844).

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

420765020 is a wasteful number, since it uses less digits than its factorization.

420765020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618349 (or 1618347 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 420765020 is about 20512.5576172256. The cubic root of 420765020 is about 749.3416563547.

The spelling of 420765020 in words is "four hundred twenty million, seven hundred sixty-five thousand, twenty".