28551655 has 8 divisors (see below), whose sum is σ = 37376784. Its totient is φ = 20764800.

The previous prime is 28551647. The next prime is 28551667. The reversal of 28551655 is 55615582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28551655 - 2³ = 28551647 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 7 ways as a sum of consecutive naturals, for example, 259506 + ... + 259615.

It is an arithmetic number, because the mean of its divisors is an integer number (4672098).

Almost surely, 2^28551655 is an apocalyptic number.

28551655 is a deficient number, since it is larger than the sum of its proper divisors (8825129).

28551655 is a wasteful number, since it uses less digits than its factorization.

28551655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519137.

The product of its digits is 60000, while the sum is 37.

The square root of 28551655 is about 5343.3748698739. The cubic root of 28551655 is about 305.6401675442.

The spelling of 28551655 in words is "twenty-eight million, five hundred fifty-one thousand, six hundred fifty-five".