28505902 has 8 divisors (see below), whose sum is σ = 43006536. Its totient is φ = 14170392.

The previous prime is 28505881. The next prime is 28505903. The reversal of 28505902 is 20950582.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28505903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40848 + ... + 41539.

It is an arithmetic number, because the mean of its divisors is an integer number (5375817).

Almost surely, 2^28505902 is an apocalyptic number.

28505902 is a deficient number, since it is larger than the sum of its proper divisors (14500634).

28505902 is a wasteful number, since it uses less digits than its factorization.

28505902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82562.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 28505902 is about 5339.0918703465. The cubic root of 28505902 is about 305.4768211365.

The spelling of 28505902 in words is "twenty-eight million, five hundred five thousand, nine hundred two".