28751007 has 8 divisors (see below), whose sum is σ = 38693376. Its totient is φ = 18987992.

The previous prime is 28751003. The next prime is 28751011. The reversal of 28751007 is 70015782.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28751003) and next prime (28751011).

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 28751007 - 2² = 28751003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28751003) 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, 44463 + ... + 45104.

It is an arithmetic number, because the mean of its divisors is an integer number (4836672).

Almost surely, 2^28751007 is an apocalyptic number.

28751007 is a deficient number, since it is larger than the sum of its proper divisors (9942369).

28751007 is a wasteful number, since it uses less digits than its factorization.

28751007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89677.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 28751007 is about 5361.9965497937. The cubic root of 28751007 is about 306.3498604235.

Adding to 28751007 its reverse (70015782), we get a palindrome (98766789).

The spelling of 28751007 in words is "twenty-eight million, seven hundred fifty-one thousand, seven".