420289380 has 72 divisors (see below), whose sum is σ = 1457007552. Its totient is φ = 96065856.

The previous prime is 420289357. The next prime is 420289409. The reversal of 420289380 is 83982024.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165522 + ... + 168041.

It is an arithmetic number, because the mean of its divisors is an integer number (20236216).

Almost surely, 2^420289380 is an apocalyptic number.

It is an amenable number.

420289380 is an abundant number, since it is smaller than the sum of its proper divisors (1036718172).

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

420289380 is a wasteful number, since it uses less digits than its factorization.

420289380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333585 (or 333580 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 420289380 is about 20500.9604653050. The cubic root of 420289380 is about 749.0591936714.

The spelling of 420289380 in words is "four hundred twenty million, two hundred eighty-nine thousand, three hundred eighty".