40840343640 has 128 divisors (see below), whose sum is σ = 140526028800. Its totient is φ = 10539434880.

The previous prime is 40840343623. The next prime is 40840343657. The reversal of 40840343640 is 4634304804.

40840343640 is a `hidden beast` number, since 4 + 0 + 8 + 4 + 0 + 3 + 4 + 3 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (40840343623) and next prime (40840343657).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 40840343595 and 40840343604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 576442 + ... + 643401.

It is an arithmetic number, because the mean of its divisors is an integer number (1097859600).

Almost surely, 2^40840343640 is an apocalyptic number.

40840343640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40840343640 is an abundant number, since it is smaller than the sum of its proper divisors (99685685160).

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

40840343640 is a wasteful number, since it uses less digits than its factorization.

40840343640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219894 (or 1219884 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The spelling of 40840343640 in words is "forty billion, eight hundred forty million, three hundred forty-three thousand, six hundred forty".