28040992 has 24 divisors (see below), whose sum is σ = 63092736. Its totient is φ = 12017472.

The previous prime is 28040983. The next prime is 28040993. The reversal of 28040992 is 29904082.

It is not an unprimeable number, because it can be changed into a prime (28040993) 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, 62368 + ... + 62815.

It is an arithmetic number, because the mean of its divisors is an integer number (2628864).

Almost surely, 2^28040992 is an apocalyptic number.

It is an amenable number.

28040992 is an abundant number, since it is smaller than the sum of its proper divisors (35051744).

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

28040992 is a wasteful number, since it uses less digits than its factorization.

28040992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125200 (or 125192 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 28040992 is about 5295.3745854283. The cubic root of 28040992 is about 303.8070104736.

The spelling of 28040992 in words is "twenty-eight million, forty thousand, nine hundred ninety-two".