28649850 has 48 divisors (see below), whose sum is σ = 71379360. Its totient is φ = 7604800.

The previous prime is 28649827. The next prime is 28649861. The reversal of 28649850 is 5894682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58105 + ... + 58595.

It is an arithmetic number, because the mean of its divisors is an integer number (1487070).

Almost surely, 2^28649850 is an apocalyptic number.

28649850 is an abundant number, since it is smaller than the sum of its proper divisors (42729510).

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

28649850 is a wasteful number, since it uses less digits than its factorization.

28649850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895 (or 890 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 28649850 is about 5352.5554644487. Note that the first 3 decimals coincide. The cubic root of 28649850 is about 305.9901530430.

The spelling of 28649850 in words is "twenty-eight million, six hundred forty-nine thousand, eight hundred fifty".