28649771934 has 64 divisors (see below), whose sum is σ = 72351968256. Its totient is φ = 7369173504.

The previous prime is 28649771933. The next prime is 28649771947. The reversal of 28649771934 is 43917794682.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28649771933) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 855877 + ... + 888720.

It is an arithmetic number, because the mean of its divisors is an integer number (1130499504).

Almost surely, 2^28649771934 is an apocalyptic number.

28649771934 is an abundant number, since it is smaller than the sum of its proper divisors (43702196322).

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

28649771934 is a wasteful number, since it uses less digits than its factorization.

28649771934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744649.

The product of its digits is 18289152, while the sum is 60.

The spelling of 28649771934 in words is "twenty-eight billion, six hundred forty-nine million, seven hundred seventy-one thousand, nine hundred thirty-four".