28011950 has 12 divisors (see below), whose sum is σ = 52102320. Its totient is φ = 11204760.

The previous prime is 28011943. The next prime is 28011989. The reversal of 28011950 is 5911082.

It is a happy number.

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, 280070 + ... + 280169.

It is an arithmetic number, because the mean of its divisors is an integer number (4341860).

Almost surely, 2^28011950 is an apocalyptic number.

28011950 is a deficient number, since it is larger than the sum of its proper divisors (24090370).

28011950 is a wasteful number, since it uses less digits than its factorization.

28011950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560251 (or 560246 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 28011950 is about 5292.6316705397. The cubic root of 28011950 is about 303.7020901365.

The spelling of 28011950 in words is "twenty-eight million, eleven thousand, nine hundred fifty".