40521900 has 72 divisors (see below), whose sum is σ = 117898704. Its totient is φ = 10745600.

The previous prime is 40521893. The next prime is 40521911. The reversal of 40521900 is 912504.

It is a super-2 number, since 2×40521900² = 3284048759220000, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87670 + ... + 88130.

It is an arithmetic number, because the mean of its divisors is an integer number (1637482).

Almost surely, 2^40521900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40521900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58949352).

40521900 is an abundant number, since it is smaller than the sum of its proper divisors (77376804).

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

40521900 is a wasteful number, since it uses less digits than its factorization.

40521900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 40521900 is about 6365.6814246395. The cubic root of 40521900 is about 343.4761609749.

The spelling of 40521900 in words is "forty million, five hundred twenty-one thousand, nine hundred".