28750770 has 24 divisors (see below), whose sum is σ = 74752236. Its totient is φ = 7666848.

The previous prime is 28750769. The next prime is 28750783. The reversal of 28750770 is 7705782.

28750770 is a `hidden beast` number, since 2 + 87 + 507 + 70 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25918281 + 2832489 = 5091^2 + 1683^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159637 + ... + 159816.

Almost surely, 2^28750770 is an apocalyptic number.

28750770 is an abundant number, since it is smaller than the sum of its proper divisors (46001466).

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

28750770 is a wasteful number, since it uses less digits than its factorization.

28750770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319466 (or 319463 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 36.

The square root of 28750770 is about 5361.9744497713. The cubic root of 28750770 is about 306.3490186546.

The spelling of 28750770 in words is "twenty-eight million, seven hundred fifty thousand, seven hundred seventy".