28773837 has 24 divisors (see below), whose sum is σ = 42900000. Its totient is φ = 18573408.

The previous prime is 28773821. The next prime is 28773853. The reversal of 28773837 is 73837782.

It is an interprime number because it is at equal distance from previous prime (28773821) and next prime (28773853).

It is not a de Polignac number, because 28773837 - 2⁴ = 28773821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28773792 and 28773801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28773817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57414 + ... + 57912.

It is an arithmetic number, because the mean of its divisors is an integer number (1787500).

Almost surely, 2^28773837 is an apocalyptic number.

It is an amenable number.

28773837 is a deficient number, since it is larger than the sum of its proper divisors (14126163).

28773837 is a wasteful number, since it uses less digits than its factorization.

28773837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697 (or 694 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The square root of 28773837 is about 5364.1249985436. The cubic root of 28773837 is about 306.4309256064.

The spelling of 28773837 in words is "twenty-eight million, seven hundred seventy-three thousand, eight hundred thirty-seven".