424228420 has 144 divisors (see below), whose sum is σ = 1136862720. Its totient is φ = 130141440.

The previous prime is 424228391. The next prime is 424228457. The reversal of 424228420 is 24822424.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1338102 + ... + 1338418.

It is an arithmetic number, because the mean of its divisors is an integer number (7894880).

Almost surely, 2^424228420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 424228420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (568431360).

424228420 is an abundant number, since it is smaller than the sum of its proper divisors (712634300).

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

424228420 is a wasteful number, since it uses less digits than its factorization.

424228420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

The square root of 424228420 is about 20596.8060630769. The cubic root of 424228420 is about 751.3920339826.

The spelling of 424228420 in words is "four hundred twenty-four million, two hundred twenty-eight thousand, four hundred twenty".