28261007 has 4 divisors (see below), whose sum is σ = 29024856. Its totient is φ = 27497160.

The previous prime is 28261003. The next prime is 28261027. The reversal of 28261007 is 70016282.

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 28261007 - 2² = 28261003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28261003) 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, 381869 + ... + 381942.

It is an arithmetic number, because the mean of its divisors is an integer number (7256214).

Almost surely, 2^28261007 is an apocalyptic number.

28261007 is a deficient number, since it is larger than the sum of its proper divisors (763849).

28261007 is an equidigital number, since it uses as much as digits as its factorization.

28261007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763848.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 28261007 is about 5316.1082569865. The cubic root of 28261007 is about 304.5995173725.

Adding to 28261007 its reverse (70016282), we get a palindrome (98277289).

The spelling of 28261007 in words is "twenty-eight million, two hundred sixty-one thousand, seven".