28780490355 has 8 divisors (see below), whose sum is σ = 46048784592. Its totient is φ = 15349594848.

The previous prime is 28780490351. The next prime is 28780490393. The reversal of 28780490355 is 55309408782.

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

It is not a de Polignac number, because 28780490355 - 2² = 28780490351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28780490298 and 28780490307.

It is not an unprimeable number, because it can be changed into a prime (28780490351) 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, 959349664 + ... + 959349693.

It is an arithmetic number, because the mean of its divisors is an integer number (5756098074).

Almost surely, 2^28780490355 is an apocalyptic number.

28780490355 is a deficient number, since it is larger than the sum of its proper divisors (17268294237).

28780490355 is a wasteful number, since it uses less digits than its factorization.

28780490355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918699365.

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 28780490355 in words is "twenty-eight billion, seven hundred eighty million, four hundred ninety thousand, three hundred fifty-five".