28400834 has 32 divisors (see below), whose sum is σ = 53415936. Its totient is φ = 11002320.

The previous prime is 28400819. The next prime is 28400843. The reversal of 28400834 is 43800482.

It is a junction number, because it is equal to n+sod(n) for n = 28400797 and 28400806.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33929 + ... + 34755.

It is an arithmetic number, because the mean of its divisors is an integer number (1669248).

Almost surely, 2^28400834 is an apocalyptic number.

28400834 is a deficient number, since it is larger than the sum of its proper divisors (25015102).

28400834 is a wasteful number, since it uses less digits than its factorization.

28400834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 28400834 is about 5329.2432858709. The cubic root of 28400834 is about 305.1010468741.

The spelling of 28400834 in words is "twenty-eight million, four hundred thousand, eight hundred thirty-four".