428121846 has 48 divisors (see below), whose sum is σ = 1005033744. Its totient is φ = 131185152.

The previous prime is 428121821. The next prime is 428121847. The reversal of 428121846 is 648121824.

It is a self number, because there is not a number n which added to its sum of digits gives 428121846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428121847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3111 + ... + 29426.

It is an arithmetic number, because the mean of its divisors is an integer number (20938203).

Almost surely, 2^428121846 is an apocalyptic number.

428121846 is an abundant number, since it is smaller than the sum of its proper divisors (576911898).

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

428121846 is a wasteful number, since it uses less digits than its factorization.

428121846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32605 (or 32602 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 428121846 is about 20691.1054803749. The cubic root of 428121846 is about 753.6837120653.

The spelling of 428121846 in words is "four hundred twenty-eight million, one hundred twenty-one thousand, eight hundred forty-six".