28740097 has 2 divisors, whose sum is σ = 28740098. Its totient is φ = 28740096.

The previous prime is 28740091. The next prime is 28740113. The reversal of 28740097 is 79004782.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28686736 + 53361 = 5356^2 + 231^2 .

It is a cyclic number.

It is not a de Polignac number, because 28740097 - 2¹⁹ = 28215809 is a prime.

It is not a weakly prime, because it can be changed into another prime (28740091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14370048 + 14370049.

It is an arithmetic number, because the mean of its divisors is an integer number (14370049).

Almost surely, 2^28740097 is an apocalyptic number.

It is an amenable number.

28740097 is a deficient number, since it is larger than the sum of its proper divisors (1).

28740097 is an equidigital number, since it uses as much as digits as its factorization.

28740097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 28740097 is about 5360.9791083346. The cubic root of 28740097 is about 306.3111058409.

The spelling of 28740097 in words is "twenty-eight million, seven hundred forty thousand, ninety-seven".