28195434 has 24 divisors (see below), whose sum is σ = 61195680. Its totient is φ = 9382248.

The previous prime is 28195423. The next prime is 28195439. The reversal of 28195434 is 43459182.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28195439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14169 + ... + 16035.

It is an arithmetic number, because the mean of its divisors is an integer number (2549820).

Almost surely, 2^28195434 is an apocalyptic number.

28195434 is an abundant number, since it is smaller than the sum of its proper divisors (33000246).

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

28195434 is a wasteful number, since it uses less digits than its factorization.

28195434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2714 (or 2711 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 28195434 is about 5309.9372877653. The cubic root of 28195434 is about 304.3637511566.

The spelling of 28195434 in words is "twenty-eight million, one hundred ninety-five thousand, four hundred thirty-four".