28451733 has 4 divisors (see below), whose sum is σ = 37935648. Its totient is φ = 18967820.

The previous prime is 28451729. The next prime is 28451743. The reversal of 28451733 is 33715482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28451733 - 2² = 28451729 is a prime.

It is a super-2 number, since 2×28451733² = 1619002221406578, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28451694 and 28451703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28451743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4741953 + ... + 4741958.

It is an arithmetic number, because the mean of its divisors is an integer number (9483912).

Almost surely, 2^28451733 is an apocalyptic number.

It is an amenable number.

28451733 is a deficient number, since it is larger than the sum of its proper divisors (9483915).

28451733 is an equidigital number, since it uses as much as digits as its factorization.

28451733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9483914.

The product of its digits is 20160, while the sum is 33.

The square root of 28451733 is about 5334.0165916502. The cubic root of 28451733 is about 305.2832019751.

The spelling of 28451733 in words is "twenty-eight million, four hundred fifty-one thousand, seven hundred thirty-three".