28373237 has 4 divisors (see below), whose sum is σ = 29606880. Its totient is φ = 27139596.

The previous prime is 28373209. The next prime is 28373239. The reversal of 28373237 is 73237382.

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 28373237 - 2¹⁸ = 28111093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28373197 and 28373206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28373239) 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, 616787 + ... + 616832.

It is an arithmetic number, because the mean of its divisors is an integer number (7401720).

Almost surely, 2^28373237 is an apocalyptic number.

It is an amenable number.

28373237 is a deficient number, since it is larger than the sum of its proper divisors (1233643).

28373237 is a wasteful number, since it uses less digits than its factorization.

28373237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233642.

The product of its digits is 42336, while the sum is 35.

The square root of 28373237 is about 5326.6534522156. The cubic root of 28373237 is about 305.0021929431.

The spelling of 28373237 in words is "twenty-eight million, three hundred seventy-three thousand, two hundred thirty-seven".