428783865906 has 32 divisors (see below), whose sum is σ = 935976571200. Its totient is φ = 129872263680.

The previous prime is 428783865869. The next prime is 428783865949. The reversal of 428783865906 is 609568387824.

It is a super-2 number, since 2×428783865906² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1417111 + ... + 1692858.

It is an arithmetic number, because the mean of its divisors is an integer number (29249267850).

Almost surely, 2^428783865906 is an apocalyptic number.

428783865906 is an abundant number, since it is smaller than the sum of its proper divisors (507192705294).

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

428783865906 is a wasteful number, since it uses less digits than its factorization.

428783865906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3112074.

The product of its (nonzero) digits is 139345920, while the sum is 66.

The spelling of 428783865906 in words is "four hundred twenty-eight billion, seven hundred eighty-three million, eight hundred sixty-five thousand, nine hundred six".