123422760440 has 64 divisors (see below), whose sum is σ = 334076659200. Its totient is φ = 40089195648.

The previous prime is 123422760431. The next prime is 123422760463. The reversal of 123422760440 is 44067224321.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 123422760440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11594564 + ... + 11605203.

It is an arithmetic number, because the mean of its divisors is an integer number (5219947800).

Almost surely, 2^123422760440 is an apocalyptic number.

123422760440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123422760440 is an abundant number, since it is smaller than the sum of its proper divisors (210653898760).

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

123422760440 is a wasteful number, since it uses less digits than its factorization.

123422760440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23199804 (or 23199800 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 35.

Adding to 123422760440 its reverse (44067224321), we get a palindrome (167489984761).

The spelling of 123422760440 in words is "one hundred twenty-three billion, four hundred twenty-two million, seven hundred sixty thousand, four hundred forty".