28986951 has 16 divisors (see below), whose sum is σ = 46496000. Its totient is φ = 15691968.

The previous prime is 28986943. The next prime is 28986961. The reversal of 28986951 is 15968982.

It is a happy number.

It is not a de Polignac number, because 28986951 - 2³ = 28986943 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28986951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28986901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35926 + ... + 36723.

It is an arithmetic number, because the mean of its divisors is an integer number (2906000).

Almost surely, 2^28986951 is an apocalyptic number.

28986951 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28986951 is a deficient number, since it is larger than the sum of its proper divisors (17509049).

28986951 is a wasteful number, since it uses less digits than its factorization.

28986951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72678.

The product of its digits is 311040, while the sum is 48.

The square root of 28986951 is about 5383.9531015788. The cubic root of 28986951 is about 307.1855944342.

The spelling of 28986951 in words is "twenty-eight million, nine hundred eighty-six thousand, nine hundred fifty-one".