428222644 has 24 divisors (see below), whose sum is σ = 754983936. Its totient is φ = 212520000.

The previous prime is 428222617. The next prime is 428222657. The reversal of 428222644 is 446222824.

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, 371469 + ... + 372619.

It is an arithmetic number, because the mean of its divisors is an integer number (31457664).

Almost surely, 2^428222644 is an apocalyptic number.

It is an amenable number.

428222644 is a deficient number, since it is larger than the sum of its proper divisors (326761292).

428222644 is a wasteful number, since it uses less digits than its factorization.

428222644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767 (or 1765 counting only the distinct ones).

The product of its digits is 49152, while the sum is 34.

The square root of 428222644 is about 20693.5411179431. The cubic root of 428222644 is about 753.7428571040.

The spelling of 428222644 in words is "four hundred twenty-eight million, two hundred twenty-two thousand, six hundred forty-four".