28428248938 has 8 divisors (see below), whose sum is σ = 42735684132. Its totient is φ = 14183020896.

The previous prime is 28428248923. The next prime is 28428248971. The reversal of 28428248938 is 83984282482.

It can be written as a sum of positive squares in 2 ways, for example, as 26862226609 + 1566022329 = 163897^2 + 39573^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15550645 + ... + 15552472.

Almost surely, 2^28428248938 is an apocalyptic number.

28428248938 is a deficient number, since it is larger than the sum of its proper divisors (14307435194).

28428248938 is a wasteful number, since it uses less digits than its factorization.

28428248938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31103576.

The product of its digits is 14155776, while the sum is 58.

The spelling of 28428248938 in words is "twenty-eight billion, four hundred twenty-eight million, two hundred forty-eight thousand, nine hundred thirty-eight".