28764138534 has 16 divisors (see below), whose sum is σ = 59512011120. Its totient is φ = 9257423840.

The previous prime is 28764138521. The next prime is 28764138541. The reversal of 28764138534 is 43583146782.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82655397 + ... + 82655744.

It is an arithmetic number, because the mean of its divisors is an integer number (3719500695).

Almost surely, 2^28764138534 is an apocalyptic number.

28764138534 is an abundant number, since it is smaller than the sum of its proper divisors (30747872586).

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

28764138534 is a wasteful number, since it uses less digits than its factorization.

28764138534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165311175.

The product of its digits is 3870720, while the sum is 51.

The spelling of 28764138534 in words is "twenty-eight billion, seven hundred sixty-four million, one hundred thirty-eight thousand, five hundred thirty-four".