28416731 has 8 divisors (see below), whose sum is σ = 33268704. Its totient is φ = 23762880.

The previous prime is 28416709. The next prime is 28416737. The reversal of 28416731 is 13761482.

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

It is a cyclic number.

It is not a de Polignac number, because 28416731 - 2¹⁰ = 28415707 is a prime.

It is a super-2 number, since 2×28416731² = 1615021201452722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28416737) 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, 49220 + ... + 49793.

It is an arithmetic number, because the mean of its divisors is an integer number (4158588).

Almost surely, 2^28416731 is an apocalyptic number.

28416731 is a deficient number, since it is larger than the sum of its proper divisors (4851973).

28416731 is an equidigital number, since it uses as much as digits as its factorization.

28416731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99061.

The product of its digits is 8064, while the sum is 32.

The square root of 28416731 is about 5330.7345647668. The cubic root of 28416731 is about 305.1579617130.

The spelling of 28416731 in words is "twenty-eight million, four hundred sixteen thousand, seven hundred thirty-one".