28491936 has 48 divisors (see below), whose sum is σ = 81593568. Its totient is φ = 8633600.

The previous prime is 28491923. The next prime is 28491937. The reversal of 28491936 is 63919482.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (28491937) 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, 12435 + ... + 14546.

It is an arithmetic number, because the mean of its divisors is an integer number (1699866).

Almost surely, 2^28491936 is an apocalyptic number.

It is an amenable number.

28491936 is an abundant number, since it is smaller than the sum of its proper divisors (53101632).

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

28491936 is a wasteful number, since it uses less digits than its factorization.

28491936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27005 (or 26997 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 28491936 is about 5337.7838097847. The cubic root of 28491936 is about 305.4269251979.

The spelling of 28491936 in words is "twenty-eight million, four hundred ninety-one thousand, nine hundred thirty-six".