428758372242 has 54 divisors (see below), whose sum is σ = 980564028327. Its totient is φ = 135380712312.

The previous prime is 428758372219. The next prime is 428758372271. The reversal of 428758372242 is 242273857824.

428758372242 is a `hidden beast` number, since 4 + 28 + 7 + 5 + 8 + 372 + 242 = 666.

It can be written as a sum of positive squares in only one way, i.e., 214379186121 + 214379186121 = 463011^2 + 463011^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=463011.

It is a super-2 number, since 2×428758372242² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 52779193 + ... + 52787315.

Almost surely, 2^428758372242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428758372242

428758372242 is an abundant number, since it is smaller than the sum of its proper divisors (551805656085).

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

428758372242 is an frugal number, since it uses more digits than its factorization.

428758372242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16292 (or 8147 counting only the distinct ones).

The product of its digits is 12042240, while the sum is 54.

The spelling of 428758372242 in words is "four hundred twenty-eight billion, seven hundred fifty-eight million, three hundred seventy-two thousand, two hundred forty-two".