28996040 has 16 divisors (see below), whose sum is σ = 65241180. Its totient is φ = 11598400.

The previous prime is 28996001. The next prime is 28996103. The reversal of 28996040 is 4069982.

It can be written as a sum of positive squares in 2 ways, for example, as 27019204 + 1976836 = 5198^2 + 1406^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28995985 and 28996003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362411 + ... + 362490.

Almost surely, 2^28996040 is an apocalyptic number.

28996040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28996040 is an abundant number, since it is smaller than the sum of its proper divisors (36245140).

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

28996040 is a wasteful number, since it uses less digits than its factorization.

28996040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724912 (or 724908 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 28996040 is about 5384.7971178123. The cubic root of 28996040 is about 307.2176975934.

The spelling of 28996040 in words is "twenty-eight million, nine hundred ninety-six thousand, forty".