28624155 has 32 divisors (see below), whose sum is σ = 52766208. Its totient is φ = 12979200.

The previous prime is 28624153. The next prime is 28624157. The reversal of 28624155 is 55142682.

28624155 = T₂₅₉ + T₂₆₀ + ... + T₅₇₃.

It is an interprime number because it is at equal distance from previous prime (28624153) and next prime (28624157).

It is not a de Polignac number, because 28624155 - 2¹ = 28624153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28624151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12715 + ... + 14795.

It is an arithmetic number, because the mean of its divisors is an integer number (1648944).

Almost surely, 2^28624155 is an apocalyptic number.

28624155 is a deficient number, since it is larger than the sum of its proper divisors (24142053).

28624155 is a wasteful number, since it uses less digits than its factorization.

28624155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227.

The product of its digits is 19200, while the sum is 33.

The square root of 28624155 is about 5350.1546706614. The cubic root of 28624155 is about 305.8986485655.

The spelling of 28624155 in words is "twenty-eight million, six hundred twenty-four thousand, one hundred fifty-five".