28135242 has 16 divisors (see below), whose sum is σ = 62522880. Its totient is φ = 9378396.

The previous prime is 28135231. The next prime is 28135277. The reversal of 28135242 is 24253182.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 260458 + ... + 260565.

It is an arithmetic number, because the mean of its divisors is an integer number (3907680).

Almost surely, 2^28135242 is an apocalyptic number.

28135242 is an abundant number, since it is smaller than the sum of its proper divisors (34387638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28135242 is a wasteful number, since it uses less digits than its factorization.

28135242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521034 (or 521028 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 28135242 is about 5304.2663960250. The cubic root of 28135242 is about 304.1470102099.

The spelling of 28135242 in words is "twenty-eight million, one hundred thirty-five thousand, two hundred forty-two".