28961450 has 36 divisors (see below), whose sum is σ = 62668422. Its totient is φ = 9928800.

The previous prime is 28961419. The next prime is 28961467. The reversal of 28961450 is 5416982.

It can be written as a sum of positive squares in 3 ways, for example, as 15864289 + 13097161 = 3983^2 + 3619^2 .

It is a super-2 number, since 2×28961450² = 1677531172205000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 28961450.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3461 + ... + 8360.

Almost surely, 2^28961450 is an apocalyptic number.

28961450 is an abundant number, since it is smaller than the sum of its proper divisors (33706972).

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

28961450 is a wasteful number, since it uses less digits than its factorization.

28961450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11847 (or 11835 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 28961450 is about 5381.5843392072. The cubic root of 28961450 is about 307.0954867840.

The spelling of 28961450 in words is "twenty-eight million, nine hundred sixty-one thousand, four hundred fifty".