40238178520 has 32 divisors (see below), whose sum is σ = 90582912720. Its totient is φ = 16086913920.

The previous prime is 40238178503. The next prime is 40238178613. The reversal of 40238178520 is 2587183204.

It is a happy number.

It is a super-2 number, since 2×40238178520² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182886 + ... + 337525.

Almost surely, 2^40238178520 is an apocalyptic number.

40238178520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40238178520 is an abundant number, since it is smaller than the sum of its proper divisors (50344734200).

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

40238178520 is a wasteful number, since it uses less digits than its factorization.

40238178520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522355 (or 522351 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 40238178520 in words is "forty billion, two hundred thirty-eight million, one hundred seventy-eight thousand, five hundred twenty".