28136942 has 8 divisors (see below), whose sum is σ = 42228000. Its totient is φ = 14060944.

The previous prime is 28136903. The next prime is 28136951. The reversal of 28136942 is 24963182.

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

It is a super-2 number, since 2×28136942² = 1583375010222728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4859 + ... + 8937.

It is an arithmetic number, because the mean of its divisors is an integer number (5278500).

Almost surely, 2^28136942 is an apocalyptic number.

28136942 is a deficient number, since it is larger than the sum of its proper divisors (14091058).

28136942 is a wasteful number, since it uses less digits than its factorization.

28136942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7530.

The product of its digits is 20736, while the sum is 35.

The square root of 28136942 is about 5304.4266419661. The cubic root of 28136942 is about 304.1531358548.

The spelling of 28136942 in words is "twenty-eight million, one hundred thirty-six thousand, nine hundred forty-two".