40784225 has 6 divisors (see below), whose sum is σ = 50572470. Its totient is φ = 32627360.

The previous prime is 40784201. The next prime is 40784243. The reversal of 40784225 is 52248704.

It can be written as a sum of positive squares in 3 ways, for example, as 4157521 + 36626704 = 2039^2 + 6052^2 .

It is not a de Polignac number, because 40784225 - 2¹⁰ = 40783201 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40784191 and 40784200.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 815660 + ... + 815709.

It is an arithmetic number, because the mean of its divisors is an integer number (8428745).

Almost surely, 2^40784225 is an apocalyptic number.

It is an amenable number.

40784225 is a deficient number, since it is larger than the sum of its proper divisors (9788245).

40784225 is a wasteful number, since it uses less digits than its factorization.

40784225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631379 (or 1631374 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 40784225 is about 6386.2528136615. The cubic root of 40784225 is about 344.2157499335.

The spelling of 40784225 in words is "forty million, seven hundred eighty-four thousand, two hundred twenty-five".