28768437 has 12 divisors (see below), whose sum is σ = 43999020. Its totient is φ = 18050688.

The previous prime is 28768427. The next prime is 28768447. The reversal of 28768437 is 73486782.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28768427) and next prime (28768447).

It can be written as a sum of positive squares in 2 ways, for example, as 8328996 + 20439441 = 2886^2 + 4521^2 .

It is not a de Polignac number, because 28768437 - 2¹⁰ = 28767413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28768392 and 28768401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28768427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93862 + ... + 94167.

It is an arithmetic number, because the mean of its divisors is an integer number (3666585).

Almost surely, 2^28768437 is an apocalyptic number.

It is an amenable number.

28768437 is a deficient number, since it is larger than the sum of its proper divisors (15230583).

28768437 is a wasteful number, since it uses less digits than its factorization.

28768437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188052 (or 188049 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 28768437 is about 5363.6216309505. The cubic root of 28768437 is about 306.4117550601.

The spelling of 28768437 in words is "twenty-eight million, seven hundred sixty-eight thousand, four hundred thirty-seven".