28139802 has 32 divisors (see below), whose sum is σ = 59590080. Its totient is φ = 8843520.

The previous prime is 28139789. The next prime is 28139807. The reversal of 28139802 is 20893182.

It is not an unprimeable number, because it can be changed into a prime (28139807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5602 + ... + 9362.

It is an arithmetic number, because the mean of its divisors is an integer number (1862190).

Almost surely, 2^28139802 is an apocalyptic number.

28139802 is an abundant number, since it is smaller than the sum of its proper divisors (31450278).

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

28139802 is a wasteful number, since it uses less digits than its factorization.

28139802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3838.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 28139802 is about 5304.6962212741. The cubic root of 28139802 is about 304.1634407948.

The spelling of 28139802 in words is "twenty-eight million, one hundred thirty-nine thousand, eight hundred two".