28561834 has 16 divisors (see below), whose sum is σ = 49635648. Its totient is φ = 12072672.

The previous prime is 28561829. The next prime is 28561867. The reversal of 28561834 is 43816582.

It is a happy number.

It is a super-2 number, since 2×28561834² = 1631556722887112, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28561793 and 28561802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12952 + ... + 14995.

It is an arithmetic number, because the mean of its divisors is an integer number (3102228).

Almost surely, 2^28561834 is an apocalyptic number.

28561834 is a deficient number, since it is larger than the sum of its proper divisors (21073814).

28561834 is a wasteful number, since it uses less digits than its factorization.

28561834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28029.

The product of its digits is 46080, while the sum is 37.

The square root of 28561834 is about 5344.3272729128. The cubic root of 28561834 is about 305.6764846640.

The spelling of 28561834 in words is "twenty-eight million, five hundred sixty-one thousand, eight hundred thirty-four".