28275555 has 32 divisors (see below), whose sum is σ = 56406528. Its totient is φ = 11750400.

The previous prime is 28275547. The next prime is 28275563. The reversal of 28275555 is 55557282.

It is an interprime number because it is at equal distance from previous prime (28275547) and next prime (28275563).

It is not a de Polignac number, because 28275555 - 2³ = 28275547 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11086 + ... + 13395.

It is an arithmetic number, because the mean of its divisors is an integer number (1762704).

Almost surely, 2^28275555 is an apocalyptic number.

28275555 is a deficient number, since it is larger than the sum of its proper divisors (28130973).

28275555 is a wasteful number, since it uses less digits than its factorization.

28275555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24507.

The product of its digits is 140000, while the sum is 39.

The square root of 28275555 is about 5317.4763751238. The cubic root of 28275555 is about 304.6517749303.

The spelling of 28275555 in words is "twenty-eight million, two hundred seventy-five thousand, five hundred fifty-five".