28729395 has 12 divisors (see below), whose sum is σ = 49797696. Its totient is φ = 15322320.

The previous prime is 28729319. The next prime is 28729403. The reversal of 28729395 is 59392782.

It is not a de Polignac number, because 28729395 - 2¹⁴ = 28713011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 638431 = 28729395 / (2 + 8 + 7 + 2 + 9 + 3 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 28729395.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319171 + ... + 319260.

It is an arithmetic number, because the mean of its divisors is an integer number (4149808).

Almost surely, 2^28729395 is an apocalyptic number.

28729395 is a deficient number, since it is larger than the sum of its proper divisors (21068301).

28729395 is a wasteful number, since it uses less digits than its factorization.

28729395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638442 (or 638439 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 28729395 is about 5359.9808768316. The cubic root of 28729395 is about 306.2730805873.

The spelling of 28729395 in words is "twenty-eight million, seven hundred twenty-nine thousand, three hundred ninety-five".