28720433301 has 32 divisors (see below), whose sum is σ = 47936759040. Its totient is φ = 14913647616.

The previous prime is 28720433297. The next prime is 28720433309. The reversal of 28720433301 is 10333402782.

It is not a de Polignac number, because 28720433301 - 2² = 28720433297 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28720433309) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1376706 + ... + 1397411.

It is an arithmetic number, because the mean of its divisors is an integer number (1498023720).

Almost surely, 2^28720433301 is an apocalyptic number.

28720433301 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28720433301 is a deficient number, since it is larger than the sum of its proper divisors (19216325739).

28720433301 is a wasteful number, since it uses less digits than its factorization.

28720433301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2774173.

The product of its (nonzero) digits is 24192, while the sum is 33.

The spelling of 28720433301 in words is "twenty-eight billion, seven hundred twenty million, four hundred thirty-three thousand, three hundred one".