28477458 has 12 divisors (see below), whose sum is σ = 61701198. Its totient is φ = 9492480.

The previous prime is 28477439. The next prime is 28477459. The reversal of 28477458 is 85477482.

It can be written as a sum of positive squares in only one way, i.e., 16136289 + 12341169 = 4017^2 + 3513^2 .

It is a super-2 number, since 2×28477458² = 1621931228283528, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28477459) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 791023 + ... + 791058.

Almost surely, 2^28477458 is an apocalyptic number.

28477458 is an abundant number, since it is smaller than the sum of its proper divisors (33223740).

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

28477458 is a wasteful number, since it uses less digits than its factorization.

28477458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582089 (or 1582086 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 28477458 is about 5336.4274566418. The cubic root of 28477458 is about 305.3751828355.

The spelling of 28477458 in words is "twenty-eight million, four hundred seventy-seven thousand, four hundred fifty-eight".