28545491934 has 64 divisors (see below), whose sum is σ = 65820955200. Its totient is φ = 9162491904.

The previous prime is 28545491927. The next prime is 28545491963. The reversal of 28545491934 is 43919454582.

It is a happy number.

28545491934 is a `hidden beast` number, since 2 + 8 + 5 + 4 + 549 + 1 + 93 + 4 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120162 + ... + 267450.

It is an arithmetic number, because the mean of its divisors is an integer number (1028452425).

Almost surely, 2^28545491934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28545491934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32910477600).

28545491934 is an abundant number, since it is smaller than the sum of its proper divisors (37275463266).

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

28545491934 is a wasteful number, since it uses less digits than its factorization.

28545491934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147434 (or 147428 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The spelling of 28545491934 in words is "twenty-eight billion, five hundred forty-five million, four hundred ninety-one thousand, nine hundred thirty-four".