40684625 has 8 divisors (see below), whose sum is σ = 50774568. Its totient is φ = 32547600.

The previous prime is 40684607. The next prime is 40684627. The reversal of 40684625 is 52648604.

It can be written as a sum of positive squares in 4 ways, for example, as 18496 + 40666129 = 136^2 + 6377^2 .

It is not a de Polignac number, because 40684625 - 2¹² = 40680529 is a prime.

It is a super-2 number, since 2×40684625² = 3310477422781250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40684627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162614 + ... + 162863.

It is an arithmetic number, because the mean of its divisors is an integer number (6346821).

Almost surely, 2^40684625 is an apocalyptic number.

It is an amenable number.

40684625 is a deficient number, since it is larger than the sum of its proper divisors (10089943).

40684625 is an equidigital number, since it uses as much as digits as its factorization.

40684625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325492 (or 325482 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 40684625 is about 6378.4500468374. The cubic root of 40684625 is about 343.9353160559.

The spelling of 40684625 in words is "forty million, six hundred eighty-four thousand, six hundred twenty-five".