28015291838 has 8 divisors (see below), whose sum is σ = 42025642032. Its totient is φ = 14006744496.

The previous prime is 28015291807. The next prime is 28015291847. The reversal of 28015291838 is 83819251082.

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

It is a junction number, because it is equal to n+sod(n) for n = 28015291792 and 28015291801.

It is a congruent number.

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, 411170 + ... + 474437.

It is an arithmetic number, because the mean of its divisors is an integer number (5253205254).

Almost surely, 2^28015291838 is an apocalyptic number.

28015291838 is a deficient number, since it is larger than the sum of its proper divisors (14010350194).

28015291838 is a wasteful number, since it uses less digits than its factorization.

28015291838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901426.

The product of its (nonzero) digits is 276480, while the sum is 47.

The spelling of 28015291838 in words is "twenty-eight billion, fifteen million, two hundred ninety-one thousand, eight hundred thirty-eight".