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28947395 = 55789479
BaseRepresentation
bin110111001101…
…1001111000011
32000110200100202
41232123033003
524402304040
62512235415
7501022511
oct156331703
960420322
1028947395
1115381674
12983bb6b
135cc6b49
143bb74b1
15281c015
hex1b9b3c3

28947395 has 4 divisors (see below), whose sum is σ = 34736880. Its totient is φ = 23157912.

The previous prime is 28947383. The next prime is 28947403. The reversal of 28947395 is 59374982.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-28947395 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2894735 + ... + 2894744.

It is an arithmetic number, because the mean of its divisors is an integer number (8684220).

Almost surely, 228947395 is an apocalyptic number.

28947395 is a deficient number, since it is larger than the sum of its proper divisors (5789485).

28947395 is an equidigital number, since it uses as much as digits as its factorization.

28947395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5789484.

The product of its digits is 544320, while the sum is 47.

The square root of 28947395 is about 5380.2783385249. The cubic root of 28947395 is about 307.0458009029.

The spelling of 28947395 in words is "twenty-eight million, nine hundred forty-seven thousand, three hundred ninety-five".

Divisors: 1 5 5789479 28947395