28013936 has 10 divisors (see below), whose sum is σ = 54277032. Its totient is φ = 14006960.

The previous prime is 28013917. The next prime is 28013939. The reversal of 28013936 is 63931082.

It is a super-2 number, since 2×28013936² = 1569561220424192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28013939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 875420 + ... + 875451.

Almost surely, 2^28013936 is an apocalyptic number.

It is an amenable number.

28013936 is a deficient number, since it is larger than the sum of its proper divisors (26263096).

28013936 is a wasteful number, since it uses less digits than its factorization.

28013936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750879 (or 1750873 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 28013936 is about 5292.8192865429. The cubic root of 28013936 is about 303.7092672889.

The spelling of 28013936 in words is "twenty-eight million, thirteen thousand, nine hundred thirty-six".