388149221042 has 54 divisors (see below), whose sum is σ = 663274040247. Its totient is φ = 170224269600.

The previous prime is 388149220993. The next prime is 388149221069. The reversal of 388149221042 is 240122941883.

It can be written as a sum of positive squares in 5 ways, for example, as 185848072201 + 202301148841 = 431101^2 + 449779^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=440539.

It is a super-2 number, since 2×388149221042² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 388149220984 and 388149221002.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 281063192 + ... + 281064572.

Almost surely, 2^388149221042 is an apocalyptic number.

388149221042 is a deficient number, since it is larger than the sum of its proper divisors (275124819205).

388149221042 is an equidigital number, since it uses as much as digits as its factorization.

388149221042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2844 (or 1423 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 44.

The spelling of 388149221042 in words is "three hundred eighty-eight billion, one hundred forty-nine million, two hundred twenty-one thousand, forty-two".