40520000 has 70 divisors (see below), whose sum is σ = 100575618. Its totient is φ = 16192000.

The previous prime is 40519991. The next prime is 40520017. The reversal of 40520000 is 2504.

It can be written as a sum of positive squares in 5 ways, for example, as 30382144 + 10137856 = 5512^2 + 3184^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39494 + ... + 40506.

Almost surely, 2^40520000 is an apocalyptic number.

40520000 is a gapful number since it is divisible by the number (40) 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 40520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50287809).

40520000 is an abundant number, since it is smaller than the sum of its proper divisors (60055618).

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

40520000 is an equidigital number, since it uses as much as digits as its factorization.

40520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045 (or 1020 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 40520000 is about 6365.5321851358. The cubic root of 40520000 is about 343.4707925617.

Adding to 40520000 its reverse (2504), we get a palindrome (40522504).

The spelling of 40520000 in words is "forty million, five hundred twenty thousand".