28751951 has 6 divisors (see below), whose sum is σ = 28934280. Its totient is φ = 28570548.

The previous prime is 28751941. The next prime is 28751969. The reversal of 28751951 is 15915782.

It is a de Polignac number, because none of the positive numbers 2^k-28751951 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 (28751941) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79910 + ... + 80268.

It is an arithmetic number, because the mean of its divisors is an integer number (4822380).

Almost surely, 2^28751951 is an apocalyptic number.

28751951 is a deficient number, since it is larger than the sum of its proper divisors (182329).

28751951 is an frugal number, since it uses more digits than its factorization.

28751951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925 (or 642 counting only the distinct ones).

The product of its digits is 25200, while the sum is 38.

The square root of 28751951 is about 5362.0845759835. The cubic root of 28751951 is about 306.3532132464.

The spelling of 28751951 in words is "twenty-eight million, seven hundred fifty-one thousand, nine hundred fifty-one".