28528937 has 4 divisors (see below), whose sum is σ = 30030480. Its totient is φ = 27027396.

The previous prime is 28528891. The next prime is 28528939. The reversal of 28528937 is 73982582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28528937 - 2¹⁰ = 28527913 is a prime.

It is a super-4 number, since 4×28528937⁴ (a number of 31 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28528939) 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, 750743 + ... + 750780.

It is an arithmetic number, because the mean of its divisors is an integer number (7507620).

Almost surely, 2^28528937 is an apocalyptic number.

It is an amenable number.

28528937 is a deficient number, since it is larger than the sum of its proper divisors (1501543).

28528937 is a wasteful number, since it uses less digits than its factorization.

28528937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501542.

The product of its digits is 241920, while the sum is 44.

The square root of 28528937 is about 5341.2486367890. The cubic root of 28528937 is about 305.5590820432.

The spelling of 28528937 in words is "twenty-eight million, five hundred twenty-eight thousand, nine hundred thirty-seven".