28538415 has 12 divisors (see below), whose sum is σ = 49466664. Its totient is φ = 15220464.

The previous prime is 28538381. The next prime is 28538429. The reversal of 28538415 is 51483582.

It is a happy number.

It is not a de Polignac number, because 28538415 - 2⁶ = 28538351 is a prime.

It is a super-2 number, since 2×28538415² = 1628882261424450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28538415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 317049 + ... + 317138.

It is an arithmetic number, because the mean of its divisors is an integer number (4122222).

Almost surely, 2^28538415 is an apocalyptic number.

28538415 is a deficient number, since it is larger than the sum of its proper divisors (20928249).

28538415 is a wasteful number, since it uses less digits than its factorization.

28538415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634198 (or 634195 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 28538415 is about 5342.1358088315. The cubic root of 28538415 is about 305.5929163254.

The spelling of 28538415 in words is "twenty-eight million, five hundred thirty-eight thousand, four hundred fifteen".