28331416 has 16 divisors (see below), whose sum is σ = 53358840. Its totient is φ = 14102400.

The previous prime is 28331411. The next prime is 28331417. The reversal of 28331416 is 61413382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28331411) 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 in 3 ways as a sum of consecutive naturals, for example, 5985 + ... + 9616.

Almost surely, 2^28331416 is an apocalyptic number.

It is an amenable number.

28331416 is a deficient number, since it is larger than the sum of its proper divisors (25027424).

28331416 is a wasteful number, since it uses less digits than its factorization.

28331416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15834 (or 15830 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 28331416 is about 5322.7263690706. The cubic root of 28331416 is about 304.8522656381.

Adding to 28331416 its reverse (61413382), we get a palindrome (89744798).

It can be divided in two parts, 2833 and 1416, that multiplied together give a triangular number (4011528 = T₂₈₃₂).

The spelling of 28331416 in words is "twenty-eight million, three hundred thirty-one thousand, four hundred sixteen".