28940544 has 144 divisors (see below), whose sum is σ = 88300800. Its totient is φ = 9345024.

The previous prime is 28940539. The next prime is 28940557. The reversal of 28940544 is 44504982.

28940544 = T₄₆ + T₄₇ + ... + T₅₅₇.

28940544 is a `hidden beast` number, since 28 + 94 + 0 + 544 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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 = 28940499 and 28940508.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 366297 + ... + 366375.

It is an arithmetic number, because the mean of its divisors is an integer number (613200).

Almost surely, 2^28940544 is an apocalyptic number.

28940544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28940544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44150400).

28940544 is an abundant number, since it is smaller than the sum of its proper divisors (59360256).

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

28940544 is an equidigital number, since it uses as much as digits as its factorization.

28940544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 28940544 is about 5379.6416237515. The cubic root of 28940544 is about 307.0215760777.

The spelling of 28940544 in words is "twenty-eight million, nine hundred forty thousand, five hundred forty-four".