28751949 has 16 divisors (see below), whose sum is σ = 42768000. Its totient is φ = 19090368.

The previous prime is 28751941. The next prime is 28751969. The reversal of 28751949 is 94915782.

It is not a de Polignac number, because 28751949 - 2³ = 28751941 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 5077 + ... + 9125.

It is an arithmetic number, because the mean of its divisors is an integer number (2673000).

Almost surely, 2^28751949 is an apocalyptic number.

It is an amenable number.

28751949 is a deficient number, since it is larger than the sum of its proper divisors (14016051).

28751949 is a wasteful number, since it uses less digits than its factorization.

28751949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4321 (or 4315 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 28751949 is about 5362.0843894888. The cubic root of 28751949 is about 306.3532061431.

The spelling of 28751949 in words is "twenty-eight million, seven hundred fifty-one thousand, nine hundred forty-nine".