28949120 has 32 divisors (see below), whose sum is σ = 69208020. Its totient is φ = 11579392.

The previous prime is 28949101. The next prime is 28949143. The reversal of 28949120 is 2194982.

It can be written as a sum of positive squares in 2 ways, for example, as 27290176 + 1658944 = 5224^2 + 1288^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21977 + ... + 23256.

Almost surely, 2^28949120 is an apocalyptic number.

28949120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28949120 is an abundant number, since it is smaller than the sum of its proper divisors (40258900).

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

28949120 is an equidigital number, since it uses as much as digits as its factorization.

28949120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45252 (or 45240 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 28949120 is about 5380.4386438282. The cubic root of 28949120 is about 307.0518998223.

The spelling of 28949120 in words is "twenty-eight million, nine hundred forty-nine thousand, one hundred twenty".