28397954 has 8 divisors (see below), whose sum is σ = 45873660. Its totient is φ = 13106736.

The previous prime is 28397947. The next prime is 28397969. The reversal of 28397954 is 45979382.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28376929 + 21025 = 5327^2 + 145^2 .

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

It is a super-2 number, since 2×28397954² = 1612887582772232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28397899 and 28397908.

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, 546089 + ... + 546140.

Almost surely, 2^28397954 is an apocalyptic number.

28397954 is a deficient number, since it is larger than the sum of its proper divisors (17475706).

28397954 is a wasteful number, since it uses less digits than its factorization.

28397954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092244.

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

The square root of 28397954 is about 5328.9730718029. The cubic root of 28397954 is about 305.0907335535.

The spelling of 28397954 in words is "twenty-eight million, three hundred ninety-seven thousand, nine hundred fifty-four".