28947570438 has 16 divisors (see below), whose sum is σ = 59126952960. Its totient is φ = 9443888136.

The previous prime is 28947570401. The next prime is 28947570473. The reversal of 28947570438 is 83407574982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51325198 + ... + 51325761.

It is an arithmetic number, because the mean of its divisors is an integer number (3695434560).

Almost surely, 2^28947570438 is an apocalyptic number.

28947570438 is an abundant number, since it is smaller than the sum of its proper divisors (30179382522).

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

28947570438 is a wasteful number, since it uses less digits than its factorization.

28947570438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102651011.

The product of its (nonzero) digits is 13547520, while the sum is 57.

The spelling of 28947570438 in words is "twenty-eight billion, nine hundred forty-seven million, five hundred seventy thousand, four hundred thirty-eight".