28624055 has 4 divisors (see below), whose sum is σ = 34348872. Its totient is φ = 22899240.

The previous prime is 28624033. The next prime is 28624087. The reversal of 28624055 is 55042682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55042682 = 2 ⋅27521341.

It is a de Polignac number, because none of the positive numbers 2^k-28624055 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2862401 + ... + 2862410.

It is an arithmetic number, because the mean of its divisors is an integer number (8587218).

Almost surely, 2^28624055 is an apocalyptic number.

28624055 is a deficient number, since it is larger than the sum of its proper divisors (5724817).

28624055 is an equidigital number, since it uses as much as digits as its factorization.

28624055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5724816.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 28624055 is about 5350.1453251290. The cubic root of 28624055 is about 305.8982923407.

The spelling of 28624055 in words is "twenty-eight million, six hundred twenty-four thousand, fifty-five".