40396065040 has 160 divisors (see below), whose sum is σ = 103903572960. Its totient is φ = 14536704000.

The previous prime is 40396065029. The next prime is 40396065049. The reversal of 40396065040 is 4056069304.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 1351885824 + 39044179216 = 36768^2 + 197596^2 .

It is not an unprimeable number, because it can be changed into a prime (40396065049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3978370 + ... + 3988510.

It is an arithmetic number, because the mean of its divisors is an integer number (649397331).

Almost surely, 2^40396065040 is an apocalyptic number.

40396065040 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 40396065040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51951786480).

40396065040 is an abundant number, since it is smaller than the sum of its proper divisors (63507507920).

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

40396065040 is a wasteful number, since it uses less digits than its factorization.

40396065040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10301 (or 10295 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 40396065040 in words is "forty billion, three hundred ninety-six million, sixty-five thousand, forty".