28628743 has 8 divisors (see below), whose sum is σ = 33633936. Its totient is φ = 24024000.

The previous prime is 28628729. The next prime is 28628749. The reversal of 28628743 is 34782682.

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

It is not a de Polignac number, because 28628743 - 2¹³ = 28620551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28628696 and 28628705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28628749) 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, 99958 + ... + 100243.

It is an arithmetic number, because the mean of its divisors is an integer number (4204242).

Almost surely, 2^28628743 is an apocalyptic number.

28628743 is a deficient number, since it is larger than the sum of its proper divisors (5005193).

28628743 is a wasteful number, since it uses less digits than its factorization.

28628743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200225.

The product of its digits is 129024, while the sum is 40.

The square root of 28628743 is about 5350.5834261321. The cubic root of 28628743 is about 305.9149912665.

The spelling of 28628743 in words is "twenty-eight million, six hundred twenty-eight thousand, seven hundred forty-three".