28737075 has 18 divisors (see below), whose sum is σ = 47588844. Its totient is φ = 15301680.

The previous prime is 28737073. The next prime is 28737083. The reversal of 28737075 is 57073782.

It is not a de Polignac number, because 28737075 - 2¹ = 28737073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28737073) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 46116 + ... + 46734.

Almost surely, 2^28737075 is an apocalyptic number.

28737075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28737075 is a deficient number, since it is larger than the sum of its proper divisors (18851769).

28737075 is an frugal number, since it uses more digits than its factorization.

28737075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251 (or 627 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 39.

The square root of 28737075 is about 5360.6972494257. The cubic root of 28737075 is about 306.3003693357.

The spelling of 28737075 in words is "twenty-eight million, seven hundred thirty-seven thousand, seventy-five".