28220427937 has 8 divisors (see below), whose sum is σ = 30397840704. Its totient is φ = 26043959568.

The previous prime is 28220427929. The next prime is 28220427947. The reversal of 28220427937 is 73972402282.

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

It is a cyclic number.

It is not a de Polignac number, because 28220427937 - 2³ = 28220427929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28220427947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173413 + ... + 294130.

It is an arithmetic number, because the mean of its divisors is an integer number (3799730088).

Almost surely, 2^28220427937 is an apocalyptic number.

It is an amenable number.

28220427937 is a deficient number, since it is larger than the sum of its proper divisors (2177412767).

28220427937 is a wasteful number, since it uses less digits than its factorization.

28220427937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472199.

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 28220427937 in words is "twenty-eight billion, two hundred twenty million, four hundred twenty-seven thousand, nine hundred thirty-seven".