38220401840 has 40 divisors (see below), whose sum is σ = 88893216720. Its totient is φ = 15282864896.

The previous prime is 38220401809. The next prime is 38220401867. The reversal of 38220401840 is 4810402283.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×38220401840² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 38220401797 and 38220401806.

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, 153842 + ... + 316398.

It is an arithmetic number, because the mean of its divisors is an integer number (2222330418).

Almost surely, 2^38220401840 is an apocalyptic number.

It is an amenable number.

38220401840 is an abundant number, since it is smaller than the sum of its proper divisors (50672814880).

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

38220401840 is a wasteful number, since it uses less digits than its factorization.

38220401840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165509 (or 165503 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The spelling of 38220401840 in words is "thirty-eight billion, two hundred twenty million, four hundred one thousand, eight hundred forty".