28649746 has 4 divisors (see below), whose sum is σ = 42974622. Its totient is φ = 14324872.

The previous prime is 28649741. The next prime is 28649749. The reversal of 28649746 is 64794682.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20748025 + 7901721 = 4555^2 + 2811^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28649696 and 28649705.

It is not an unprimeable number, because it can be changed into a prime (28649741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7162435 + ... + 7162438.

Almost surely, 2^28649746 is an apocalyptic number.

28649746 is a deficient number, since it is larger than the sum of its proper divisors (14324876).

28649746 is a wasteful number, since it uses less digits than its factorization.

28649746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14324875.

The product of its digits is 580608, while the sum is 46.

The square root of 28649746 is about 5352.5457494542. The cubic root of 28649746 is about 305.9897827907.

The spelling of 28649746 in words is "twenty-eight million, six hundred forty-nine thousand, seven hundred forty-six".