40957820 has 36 divisors (see below), whose sum is σ = 88917192. Its totient is φ = 15847200.

The previous prime is 40957799. The next prime is 40957877. The reversal of 40957820 is 2875904.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18155 + ... + 20285.

It is an arithmetic number, because the mean of its divisors is an integer number (2469922).

Almost surely, 2^40957820 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 40957820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44458596).

40957820 is an abundant number, since it is smaller than the sum of its proper divisors (47959372).

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

40957820 is a wasteful number, since it uses less digits than its factorization.

40957820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202 (or 2169 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 40957820 is about 6399.8296852338. The cubic root of 40957820 is about 344.7034348440.

The spelling of 40957820 in words is "forty million, nine hundred fifty-seven thousand, eight hundred twenty".