422391138750 has 160 divisors (see below), whose sum is σ = 1340495904000. Its totient is φ = 96546492000.

The previous prime is 422391138713. The next prime is 422391138761. The reversal of 422391138750 is 57831193224.

It is a happy number.

422391138750 is a `hidden beast` number, since 422 + 3 + 91 + 13 + 87 + 50 = 666.

It is a super-3 number, since 3×422391138750³ (a number of 36 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 422391138696 and 422391138705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 657700 + ... + 1130199.

It is an arithmetic number, because the mean of its divisors is an integer number (8378099400).

Almost surely, 2^422391138750 is an apocalyptic number.

422391138750 is an abundant number, since it is smaller than the sum of its proper divisors (918104765250).

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

422391138750 is a wasteful number, since it uses less digits than its factorization.

422391138750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787937 (or 1787916 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 422391138750 in words is "four hundred twenty-two billion, three hundred ninety-one million, one hundred thirty-eight thousand, seven hundred fifty".