123922172240 has 80 divisors (see below), whose sum is σ = 289338647808. Its totient is φ = 49359518208.

The previous prime is 123922172221. The next prime is 123922172273. The reversal of 123922172240 is 42271229321.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 123922172240.

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 15 ways as a sum of consecutive naturals, for example, 19368722 + ... + 19375118.

Almost surely, 2^123922172240 is an apocalyptic number.

123922172240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123922172240 is an abundant number, since it is smaller than the sum of its proper divisors (165416475568).

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

123922172240 is a wasteful number, since it uses less digits than its factorization.

123922172240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7396 (or 7390 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The spelling of 123922172240 in words is "one hundred twenty-three billion, nine hundred twenty-two million, one hundred seventy-two thousand, two hundred forty".