420064440 has 32 divisors (see below), whose sum is σ = 1260193680. Its totient is φ = 112017152.

The previous prime is 420064439. The next prime is 420064451. The reversal of 420064440 is 44460024.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 420064440.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1750149 + ... + 1750388.

Almost surely, 2^420064440 is an apocalyptic number.

420064440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420064440 is an abundant number, since it is smaller than the sum of its proper divisors (840129240).

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

420064440 is a wasteful number, since it uses less digits than its factorization.

420064440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500551 (or 3500547 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 420064440 is about 20495.4736466372. The cubic root of 420064440 is about 748.9255369963.

The spelling of 420064440 in words is "four hundred twenty million, sixty-four thousand, four hundred forty".