28976040 has 48 divisors (see below), whose sum is σ = 94173300. Its totient is φ = 7726848.

The previous prime is 28976029. The next prime is 28976089. The reversal of 28976040 is 4067982.

It can be written as a sum of positive squares in 2 ways, for example, as 27185796 + 1790244 = 5214^2 + 1338^2 .

It is a super-2 number, since 2×28976040² = 1679221788163200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28975986 and 28976004.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39885 + ... + 40604.

Almost surely, 2^28976040 is an apocalyptic number.

28976040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28976040 is an abundant number, since it is smaller than the sum of its proper divisors (65197260).

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

28976040 is a wasteful number, since it uses less digits than its factorization.

28976040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80506 (or 80499 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 28976040 is about 5382.9397172920. The cubic root of 28976040 is about 307.1470469438.

The spelling of 28976040 in words is "twenty-eight million, nine hundred seventy-six thousand, forty".