40662640 has 80 divisors (see below), whose sum is σ = 103654080. Its totient is φ = 14766080.

The previous prime is 40662637. The next prime is 40662647. The reversal of 40662640 is 4626604.

40662640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 40662599 and 40662608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40662647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38925 + ... + 39955.

It is an arithmetic number, because the mean of its divisors is an integer number (1295676).

Almost surely, 2^40662640 is an apocalyptic number.

40662640 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 40662640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51827040).

40662640 is an abundant number, since it is smaller than the sum of its proper divisors (62991440).

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

40662640 is a wasteful number, since it uses less digits than its factorization.

40662640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090 (or 1084 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 40662640 is about 6376.7264328964. The cubic root of 40662640 is about 343.8733534157.

The spelling of 40662640 in words is "forty million, six hundred sixty-two thousand, six hundred forty".