40128838486 has 32 divisors (see below), whose sum is σ = 67327920000. Its totient is φ = 17780273280.

The previous prime is 40128838483. The next prime is 40128838501. The reversal of 40128838486 is 68483882104.

It is a happy number.

It is a super-2 number, since 2×40128838486² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40128838483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429550 + ... + 514558.

It is an arithmetic number, because the mean of its divisors is an integer number (2103997500).

Almost surely, 2^40128838486 is an apocalyptic number.

40128838486 is a deficient number, since it is larger than the sum of its proper divisors (27199081514).

40128838486 is a wasteful number, since it uses less digits than its factorization.

40128838486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85564.

The product of its (nonzero) digits is 2359296, while the sum is 52.

The spelling of 40128838486 in words is "forty billion, one hundred twenty-eight million, eight hundred thirty-eight thousand, four hundred eighty-six".