28981662 has 8 divisors (see below), whose sum is σ = 57963336. Its totient is φ = 9660552.

The previous prime is 28981661. The next prime is 28981697. The reversal of 28981662 is 26618982.

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

28981662 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28981661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2415133 + ... + 2415144.

It is an arithmetic number, because the mean of its divisors is an integer number (7245417).

Almost surely, 2^28981662 is an apocalyptic number.

28981662 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28981662 is a wasteful number, since it uses less digits than its factorization.

28981662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4830282.

The product of its digits is 82944, while the sum is 42.

The square root of 28981662 is about 5383.4618973296. The cubic root of 28981662 is about 307.1669101254.

It can be divided in two parts, 2898 and 1662, that added together give a triangular number (4560 = T₉₅).

The spelling of 28981662 in words is "twenty-eight million, nine hundred eighty-one thousand, six hundred sixty-two".