28038555 has 48 divisors (see below), whose sum is σ = 51577344. Its totient is φ = 14605920.

The previous prime is 28038551. The next prime is 28038583. The reversal of 28038555 is 55583082.

It is not a de Polignac number, because 28038555 - 2² = 28038551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28038551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56860 + ... + 57350.

It is an arithmetic number, because the mean of its divisors is an integer number (1074528).

Almost surely, 2^28038555 is an apocalyptic number.

28038555 is a deficient number, since it is larger than the sum of its proper divisors (23538789).

28038555 is an equidigital number, since it uses as much as digits as its factorization.

28038555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 28038555 is about 5295.1444739497. The cubic root of 28038555 is about 303.7982090834.

The spelling of 28038555 in words is "twenty-eight million, thirty-eight thousand, five hundred fifty-five".