28763555 has 4 divisors (see below), whose sum is σ = 34516272. Its totient is φ = 23010840.

The previous prime is 28763551. The next prime is 28763573. The reversal of 28763555 is 55536782.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28763555 - 2² = 28763551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28763551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2876351 + ... + 2876360.

It is an arithmetic number, because the mean of its divisors is an integer number (8629068).

Almost surely, 2^28763555 is an apocalyptic number.

28763555 is a deficient number, since it is larger than the sum of its proper divisors (5752717).

28763555 is an equidigital number, since it uses as much as digits as its factorization.

28763555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5752716.

The product of its digits is 252000, while the sum is 41.

The square root of 28763555 is about 5363.1665086961. The cubic root of 28763555 is about 306.3944214013.

The spelling of 28763555 in words is "twenty-eight million, seven hundred sixty-three thousand, five hundred fifty-five".