28194040 has 32 divisors (see below), whose sum is σ = 72499680. Its totient is φ = 9666432.

The previous prime is 28194011. The next prime is 28194059. The reversal of 28194040 is 4049182.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50067 + ... + 50626.

It is an arithmetic number, because the mean of its divisors is an integer number (2265615).

Almost surely, 2^28194040 is an apocalyptic number.

28194040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28194040 is an abundant number, since it is smaller than the sum of its proper divisors (44305640).

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

28194040 is a wasteful number, since it uses less digits than its factorization.

28194040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100711 (or 100707 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 28194040 is about 5309.8060228223. The cubic root of 28194040 is about 304.3587350955.

It can be divided in two parts, 2819 and 4040, that added together give a cube (6859 = 19³).

The spelling of 28194040 in words is "twenty-eight million, one hundred ninety-four thousand, forty".