28461953 has 4 divisors (see below), whose sum is σ = 30651348. Its totient is φ = 26272560.

The previous prime is 28461911. The next prime is 28461959. The reversal of 28461953 is 35916482.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8952064 + 19509889 = 2992^2 + 4417^2 .

It is a cyclic number.

It is not a de Polignac number, because 28461953 - 2⁶ = 28461889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28461959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1094678 + ... + 1094703.

It is an arithmetic number, because the mean of its divisors is an integer number (7662837).

Almost surely, 2^28461953 is an apocalyptic number.

It is an amenable number.

28461953 is a deficient number, since it is larger than the sum of its proper divisors (2189395).

28461953 is a wasteful number, since it uses less digits than its factorization.

28461953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189394.

The product of its digits is 51840, while the sum is 38.

The square root of 28461953 is about 5334.9745079054. The cubic root of 28461953 is about 305.3197506665.

The spelling of 28461953 in words is "twenty-eight million, four hundred sixty-one thousand, nine hundred fifty-three".