428523437934 has 56 divisors (see below), whose sum is σ = 964788564240. Its totient is φ = 142685268768.

The previous prime is 428523437911. The next prime is 428523437941. The reversal of 428523437934 is 439734325824.

It is a happy number.

428523437934 is a `hidden beast` number, since 4 + 2 + 8 + 5 + 234 + 379 + 34 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1179994 + ... + 1499810.

Almost surely, 2^428523437934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428523437934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (482394282120).

428523437934 is an abundant number, since it is smaller than the sum of its proper divisors (536265126306).

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

428523437934 is an equidigital number, since it uses as much as digits as its factorization.

428523437934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320756 (or 320741 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 54.

The spelling of 428523437934 in words is "four hundred twenty-eight billion, five hundred twenty-three million, four hundred thirty-seven thousand, nine hundred thirty-four".