28078734201 has 16 divisors (see below), whose sum is σ = 42938917248. Its totient is φ = 15987888000.

The previous prime is 28078734197. The next prime is 28078734241. The reversal of 28078734201 is 10243787082.

It is not a de Polignac number, because 28078734201 - 2² = 28078734197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28078734241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2373250 + ... + 2385051.

It is an arithmetic number, because the mean of its divisors is an integer number (2683682328).

Almost surely, 2^28078734201 is an apocalyptic number.

28078734201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28078734201 is a deficient number, since it is larger than the sum of its proper divisors (14860183047).

28078734201 is a wasteful number, since it uses less digits than its factorization.

28078734201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4758592.

The product of its (nonzero) digits is 150528, while the sum is 42.

The spelling of 28078734201 in words is "twenty-eight billion, seventy-eight million, seven hundred thirty-four thousand, two hundred one".