123890191040 has 112 divisors (see below), whose sum is σ = 367809133824. Its totient is φ = 38615116800.

The previous prime is 123890191031. The next prime is 123890191147. The reversal of 123890191040 is 40191098321.

It is a tau number, because it is divible by the number of its divisors (112).

It is a junction number, because it is equal to n+sod(n) for n = 123890190985 and 123890191003.

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 15 ways as a sum of consecutive naturals, for example, 2489366 + ... + 2538645.

Almost surely, 2^123890191040 is an apocalyptic number.

123890191040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123890191040 is an abundant number, since it is smaller than the sum of its proper divisors (243918942784).

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

123890191040 is a wasteful number, since it uses less digits than its factorization.

123890191040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5028046 (or 5028036 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The spelling of 123890191040 in words is "one hundred twenty-three billion, eight hundred ninety million, one hundred ninety-one thousand, forty".