28619642 has 4 divisors (see below), whose sum is σ = 42929466. Its totient is φ = 14309820.

The previous prime is 28619627. The next prime is 28619677. The reversal of 28619642 is 24691682.

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., 27133681 + 1485961 = 5209^2 + 1219^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28619596 and 28619605.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7154909 + ... + 7154912.

Almost surely, 2^28619642 is an apocalyptic number.

28619642 is a deficient number, since it is larger than the sum of its proper divisors (14309824).

28619642 is a wasteful number, since it uses less digits than its factorization.

28619642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14309823.

The product of its digits is 41472, while the sum is 38.

The square root of 28619642 is about 5349.7328905283. The cubic root of 28619642 is about 305.8825713147.

The spelling of 28619642 in words is "twenty-eight million, six hundred nineteen thousand, six hundred forty-two".