28461577 has 8 divisors (see below), whose sum is σ = 28944000. Its totient is φ = 27982944.

The previous prime is 28461569. The next prime is 28461611. The reversal of 28461577 is 77516482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28461577 - 2³ = 28461569 is a prime.

It is a super-2 number, since 2×28461577² = 1620122730653858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28461527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16908 + ... + 18514.

It is an arithmetic number, because the mean of its divisors is an integer number (3618000).

Almost surely, 2^28461577 is an apocalyptic number.

It is an amenable number.

28461577 is a deficient number, since it is larger than the sum of its proper divisors (482423).

28461577 is a wasteful number, since it uses less digits than its factorization.

28461577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895.

The product of its digits is 94080, while the sum is 40.

The square root of 28461577 is about 5334.9392686328. The cubic root of 28461577 is about 305.3184061730.

The spelling of 28461577 in words is "twenty-eight million, four hundred sixty-one thousand, five hundred seventy-seven".