28573155 has 72 divisors (see below), whose sum is σ = 56211792. Its totient is φ = 13856832.

The previous prime is 28573147. The next prime is 28573157. The reversal of 28573155 is 55137582.

It is not a de Polignac number, because 28573155 - 2³ = 28573147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28573157) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 426432 + ... + 426498.

Almost surely, 2^28573155 is an apocalyptic number.

28573155 is a deficient number, since it is larger than the sum of its proper divisors (27638637).

28573155 is an frugal number, since it uses more digits than its factorization.

28573155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 88 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 28573155 is about 5345.3863284144. The cubic root of 28573155 is about 305.7168661321.

The spelling of 28573155 in words is "twenty-eight million, five hundred seventy-three thousand, one hundred fifty-five".