28140351 has 4 divisors (see below), whose sum is σ = 37520472. Its totient is φ = 18760232.

The previous prime is 28140347. The next prime is 28140367. The reversal of 28140351 is 15304182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28140351 - 2² = 28140347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28140331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4690056 + ... + 4690061.

It is an arithmetic number, because the mean of its divisors is an integer number (9380118).

Almost surely, 2^28140351 is an apocalyptic number.

28140351 is a deficient number, since it is larger than the sum of its proper divisors (9380121).

28140351 is an equidigital number, since it uses as much as digits as its factorization.

28140351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9380120.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 28140351 is about 5304.7479676230. The cubic root of 28140351 is about 304.1654188310.

The spelling of 28140351 in words is "twenty-eight million, one hundred forty thousand, three hundred fifty-one".