28135550 has 12 divisors (see below), whose sum is σ = 52332216. Its totient is φ = 11254200.

The previous prime is 28135501. The next prime is 28135567. The reversal of 28135550 is 5553182.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 281306 + ... + 281405.

It is an arithmetic number, because the mean of its divisors is an integer number (4361018).

Almost surely, 2^28135550 is an apocalyptic number.

28135550 is a deficient number, since it is larger than the sum of its proper divisors (24196666).

28135550 is a wasteful number, since it uses less digits than its factorization.

28135550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562723 (or 562718 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 28135550 is about 5304.2954291781. The cubic root of 28135550 is about 304.1481200509.

The spelling of 28135550 in words is "twenty-eight million, one hundred thirty-five thousand, five hundred fifty".