28880737 has 2 divisors, whose sum is σ = 28880738. Its totient is φ = 28880736.

The previous prime is 28880729. The next prime is 28880759. The reversal of 28880737 is 73708882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28772496 + 108241 = 5364^2 + 329^2 .

It is a cyclic number.

It is not a de Polignac number, because 28880737 - 2³ = 28880729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28880693 and 28880702.

It is not a weakly prime, because it can be changed into another prime (28880777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14440368 + 14440369.

It is an arithmetic number, because the mean of its divisors is an integer number (14440369).

Almost surely, 2^28880737 is an apocalyptic number.

It is an amenable number.

28880737 is a deficient number, since it is larger than the sum of its proper divisors (1).

28880737 is an equidigital number, since it uses as much as digits as its factorization.

28880737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 28880737 is about 5374.0801073300. The cubic root of 28880737 is about 306.8099386989.

The spelling of 28880737 in words is "twenty-eight million, eight hundred eighty thousand, seven hundred thirty-seven".