28137707 has 8 divisors (see below), whose sum is σ = 30458736. Its totient is φ = 25839072.

The previous prime is 28137679. The next prime is 28137719. The reversal of 28137707 is 70773182.

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

It is a cyclic number.

It is not a de Polignac number, because 28137707 - 2⁸ = 28137451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28137757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2933 + ... + 8054.

It is an arithmetic number, because the mean of its divisors is an integer number (3807342).

Almost surely, 2^28137707 is an apocalyptic number.

28137707 is a deficient number, since it is larger than the sum of its proper divisors (2321029).

28137707 is a wasteful number, since it uses less digits than its factorization.

28137707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11197.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 28137707 is about 5304.4987510603. The cubic root of 28137707 is about 304.1558923145.

The spelling of 28137707 in words is "twenty-eight million, one hundred thirty-seven thousand, seven hundred seven".