40643724 has 48 divisors (see below), whose sum is σ = 104146560. Its totient is φ = 12234240.

The previous prime is 40643711. The next prime is 40643747. The reversal of 40643724 is 42734604.

It is a junction number, because it is equal to n+sod(n) for n = 40643691 and 40643700.

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 15 ways as a sum of consecutive naturals, for example, 20572 + ... + 22460.

It is an arithmetic number, because the mean of its divisors is an integer number (2169720).

Almost surely, 2^40643724 is an apocalyptic number.

40643724 is a gapful number since it is divisible by the number (44) 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 40643724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52073280).

40643724 is an abundant number, since it is smaller than the sum of its proper divisors (63502836).

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

40643724 is a wasteful number, since it uses less digits than its factorization.

40643724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070 (or 2068 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 40643724 is about 6375.2430541902. The cubic root of 40643724 is about 343.8200225838.

The spelling of 40643724 in words is "forty million, six hundred forty-three thousand, seven hundred twenty-four".