28501738 has 8 divisors (see below), whose sum is σ = 44611488. Its totient is φ = 13631244.

The previous prime is 28501727. The next prime is 28501769. The reversal of 28501738 is 83710582.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309756 + ... + 309847.

It is an arithmetic number, because the mean of its divisors is an integer number (5576436).

Almost surely, 2^28501738 is an apocalyptic number.

28501738 is a deficient number, since it is larger than the sum of its proper divisors (16109750).

28501738 is a wasteful number, since it uses less digits than its factorization.

28501738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619628.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 28501738 is about 5338.7019021481. The cubic root of 28501738 is about 305.4619462353.

The spelling of 28501738 in words is "twenty-eight million, five hundred one thousand, seven hundred thirty-eight".