40138809384 has 32 divisors (see below), whose sum is σ = 100947913920. Its totient is φ = 13299484416.

The previous prime is 40138809371. The next prime is 40138809401. The reversal of 40138809384 is 48390883104.

It is a super-2 number, since 2×40138809384² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5003329 + ... + 5011344.

It is an arithmetic number, because the mean of its divisors is an integer number (3154622310).

Almost surely, 2^40138809384 is an apocalyptic number.

It is an amenable number.

40138809384 is an abundant number, since it is smaller than the sum of its proper divisors (60809104536).

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

40138809384 is a wasteful number, since it uses less digits than its factorization.

40138809384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10014849 (or 10014845 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The spelling of 40138809384 in words is "forty billion, one hundred thirty-eight million, eight hundred nine thousand, three hundred eighty-four".