28196955 has 12 divisors (see below), whose sum is σ = 48874800. Its totient is φ = 15038352.

The previous prime is 28196953. The next prime is 28196963. The reversal of 28196955 is 55969182.

It is not a de Polignac number, because 28196955 - 2¹ = 28196953 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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: 626599 = 28196955 / (2 + 8 + 1 + 9 + 6 + 9 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 28196955.

It is not an unprimeable number, because it can be changed into a prime (28196953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 313255 + ... + 313344.

It is an arithmetic number, because the mean of its divisors is an integer number (4072900).

Almost surely, 2^28196955 is an apocalyptic number.

28196955 is a deficient number, since it is larger than the sum of its proper divisors (20677845).

28196955 is a wasteful number, since it uses less digits than its factorization.

28196955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626610 (or 626607 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 28196955 is about 5310.0805078643. The cubic root of 28196955 is about 304.3692240161.

The spelling of 28196955 in words is "twenty-eight million, one hundred ninety-six thousand, nine hundred fifty-five".