28405653 has 8 divisors (see below), whose sum is σ = 37905600. Its totient is φ = 18921408.

The previous prime is 28405639. The next prime is 28405673. The reversal of 28405653 is 35650482.

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

It is not a de Polignac number, because 28405653 - 2⁹ = 28405141 is a prime.

It is a super-2 number, since 2×28405653² = 1613762244712818, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28405613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1288 + ... + 7646.

It is an arithmetic number, because the mean of its divisors is an integer number (4738200).

Almost surely, 2^28405653 is an apocalyptic number.

It is an amenable number.

28405653 is a deficient number, since it is larger than the sum of its proper divisors (9499947).

28405653 is a wasteful number, since it uses less digits than its factorization.

28405653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7851.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 28405653 is about 5329.6953946731. The cubic root of 28405653 is about 305.1183022218.

The spelling of 28405653 in words is "twenty-eight million, four hundred five thousand, six hundred fifty-three".