40641720 has 64 divisors (see below), whose sum is σ = 139345920. Its totient is φ = 9289344.

The previous prime is 40641719. The next prime is 40641721. The reversal of 40641720 is 2714604.

It is an interprime number because it is at equal distance from previous prime (40641719) and next prime (40641721).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40641721) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 23352 + ... + 25031.

It is an arithmetic number, because the mean of its divisors is an integer number (2177280).

Almost surely, 2^40641720 is an apocalyptic number.

40641720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40641720 is an abundant number, since it is smaller than the sum of its proper divisors (98704200).

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

40641720 is a wasteful number, since it uses less digits than its factorization.

40641720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48404 (or 48400 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 40641720 is about 6375.0858817745. The cubic root of 40641720 is about 343.8143716363.

The spelling of 40641720 in words is "forty million, six hundred forty-one thousand, seven hundred twenty".