28693019 has 8 divisors (see below), whose sum is σ = 29758560. Its totient is φ = 27642816.

The previous prime is 28693009. The next prime is 28693039. The reversal of 28693019 is 91039682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28693019 - 2¹² = 28688923 is a prime.

It is a super-2 number, since 2×28693019² = 1646578678668722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28693009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47 + ... + 7575.

It is an arithmetic number, because the mean of its divisors is an integer number (3719820).

Almost surely, 2^28693019 is an apocalyptic number.

28693019 is a deficient number, since it is larger than the sum of its proper divisors (1065541).

28693019 is a wasteful number, since it uses less digits than its factorization.

28693019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7669.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 28693019 is about 5356.5865063490. The cubic root of 28693019 is about 306.1437624565.

The spelling of 28693019 in words is "twenty-eight million, six hundred ninety-three thousand, nineteen".