28554400215 has 48 divisors (see below), whose sum is σ = 54908979840. Its totient is φ = 13609890240.

The previous prime is 28554400213. The next prime is 28554400247. The reversal of 28554400215 is 51200445582.

It is not a de Polignac number, because 28554400215 - 2¹ = 28554400213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28554400215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28554400213) 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, 459657 + ... + 518066.

It is an arithmetic number, because the mean of its divisors is an integer number (1143937080).

Almost surely, 2^28554400215 is an apocalyptic number.

28554400215 is a deficient number, since it is larger than the sum of its proper divisors (26354579625).

28554400215 is a wasteful number, since it uses less digits than its factorization.

28554400215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977804 (or 977801 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 36.

Adding to 28554400215 its reverse (51200445582), we get a palindrome (79754845797).

The spelling of 28554400215 in words is "twenty-eight billion, five hundred fifty-four million, four hundred thousand, two hundred fifteen".