40400040840 has 64 divisors (see below), whose sum is σ = 122660395200. Its totient is φ = 10643542272.

The previous prime is 40400040829. The next prime is 40400040851. The reversal of 40400040840 is 4804000404.

It is an interprime number because it is at equal distance from previous prime (40400040829) and next prime (40400040851).

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

It is a self number, because there is not a number n which added to its sum of digits gives 40400040840.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2018155 + ... + 2038074.

It is an arithmetic number, because the mean of its divisors is an integer number (1916568675).

Almost surely, 2^40400040840 is an apocalyptic number.

40400040840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40400040840 is an abundant number, since it is smaller than the sum of its proper divisors (82260354360).

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

40400040840 is a wasteful number, since it uses less digits than its factorization.

40400040840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4056326 (or 4056322 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The spelling of 40400040840 in words is "forty billion, four hundred million, forty thousand, eight hundred forty".