28820690247 has 8 divisors (see below), whose sum is σ = 40098351744. Its totient is φ = 18378411128.

The previous prime is 28820690243. The next prime is 28820690287. The reversal of 28820690247 is 74209602882.

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 28820690247 - 2² = 28820690243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28820690196 and 28820690205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28820690243) 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, 208845513 + ... + 208845650.

It is an arithmetic number, because the mean of its divisors is an integer number (5012293968).

Almost surely, 2^28820690247 is an apocalyptic number.

28820690247 is a deficient number, since it is larger than the sum of its proper divisors (11277661497).

28820690247 is a wasteful number, since it uses less digits than its factorization.

28820690247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417691189.

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 28820690247 in words is "twenty-eight billion, eight hundred twenty million, six hundred ninety thousand, two hundred forty-seven".