28539466 has 4 divisors (see below), whose sum is σ = 42809202. Its totient is φ = 14269732.

The previous prime is 28539449. The next prime is 28539479. The reversal of 28539466 is 66493582.

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

It can be written as a sum of positive squares in only one way, i.e., 23571025 + 4968441 = 4855^2 + 2229^2 .

It is a super-2 number, since 2×28539466² = 1629002239130312, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7134865 + ... + 7134868.

Almost surely, 2^28539466 is an apocalyptic number.

28539466 is a deficient number, since it is larger than the sum of its proper divisors (14269736).

28539466 is a wasteful number, since it uses less digits than its factorization.

28539466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14269735.

The product of its digits is 311040, while the sum is 43.

The square root of 28539466 is about 5342.2341768215. The cubic root of 28539466 is about 305.5966676925.

The spelling of 28539466 in words is "twenty-eight million, five hundred thirty-nine thousand, four hundred sixty-six".