28197734 has 8 divisors (see below), whose sum is σ = 42441840. Its totient is φ = 14050456.

The previous prime is 28197733. The next prime is 28197739. The reversal of 28197734 is 43779182.

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

It is a super-2 number, since 2×28197734² = 1590224405469512, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28197691 and 28197700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28197731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23474 + ... + 24645.

It is an arithmetic number, because the mean of its divisors is an integer number (5305230).

Almost surely, 2^28197734 is an apocalyptic number.

28197734 is a deficient number, since it is larger than the sum of its proper divisors (14244106).

28197734 is a wasteful number, since it uses less digits than its factorization.

28197734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48414.

The product of its digits is 84672, while the sum is 41.

The square root of 28197734 is about 5310.1538584113. The cubic root of 28197734 is about 304.3720269363.

The spelling of 28197734 in words is "twenty-eight million, one hundred ninety-seven thousand, seven hundred thirty-four".