40995640 has 64 divisors (see below), whose sum is σ = 108840960. Its totient is φ = 13599360.

The previous prime is 40995631. The next prime is 40995649. The reversal of 40995640 is 4659904.

It is an interprime number because it is at equal distance from previous prime (40995631) and next prime (40995649).

It is a self number, because there is not a number n which added to its sum of digits gives 40995640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40995649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6319 + ... + 11041.

It is an arithmetic number, because the mean of its divisors is an integer number (1700640).

Almost surely, 2^40995640 is an apocalyptic number.

40995640 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 40995640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54420480).

40995640 is an abundant number, since it is smaller than the sum of its proper divisors (67845320).

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

40995640 is a wasteful number, since it uses less digits than its factorization.

40995640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4772 (or 4768 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 40995640 is about 6402.7837695802. The cubic root of 40995640 is about 344.8095006561.

The spelling of 40995640 in words is "forty million, nine hundred ninety-five thousand, six hundred forty".