28949170 has 16 divisors (see below), whose sum is σ = 53517528. Its totient is φ = 11266560.

The previous prime is 28949153. The next prime is 28949189. The reversal of 28949170 is 7194982.

It can be written as a sum of positive squares in 4 ways, for example, as 28740321 + 208849 = 5361^2 + 457^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38751 + ... + 39490.

Almost surely, 2^28949170 is an apocalyptic number.

28949170 is a deficient number, since it is larger than the sum of its proper divisors (24568358).

28949170 is a wasteful number, since it uses less digits than its factorization.

28949170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78285.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 28949170 is about 5380.4432902875. The cubic root of 28949170 is about 307.0520765990.

The spelling of 28949170 in words is "twenty-eight million, nine hundred forty-nine thousand, one hundred seventy".