428639322 has 16 divisors (see below), whose sum is σ = 858396960. Its totient is φ = 142693392.

The previous prime is 428639317. The next prime is 428639327. The reversal of 428639322 is 223936824.

It is an interprime number because it is at equal distance from previous prime (428639317) and next prime (428639327).

It is not an unprimeable number, because it can be changed into a prime (428639327) 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, 41572 + ... + 50847.

It is an arithmetic number, because the mean of its divisors is an integer number (53649810).

Almost surely, 2^428639322 is an apocalyptic number.

428639322 is an abundant number, since it is smaller than the sum of its proper divisors (429757638).

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

428639322 is a wasteful number, since it uses less digits than its factorization.

428639322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93197.

The product of its digits is 124416, while the sum is 39.

The square root of 428639322 is about 20703.6064974197. The cubic root of 428639322 is about 753.9872519756.

The spelling of 428639322 in words is "four hundred twenty-eight million, six hundred thirty-nine thousand, three hundred twenty-two".