122743640 has 32 divisors (see below), whose sum is σ = 288182880. Its totient is φ = 46962432.

The previous prime is 122743639. The next prime is 122743657. The reversal of 122743640 is 46347221.

It is a congruent number.

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, 65789 + ... + 67628.

It is an arithmetic number, because the mean of its divisors is an integer number (9005715).

Almost surely, 2^122743640 is an apocalyptic number.

122743640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122743640 is an abundant number, since it is smaller than the sum of its proper divisors (165439240).

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

122743640 is a wasteful number, since it uses less digits than its factorization.

122743640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133451 (or 133447 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 122743640 is about 11078.9728765802. The cubic root of 122743640 is about 496.9732343516.

The spelling of 122743640 in words is "one hundred twenty-two million, seven hundred forty-three thousand, six hundred forty".