123402210440 has 16 divisors (see below), whose sum is σ = 277654973580. Its totient is φ = 49360884160.

The previous prime is 123402210433. The next prime is 123402210487. The reversal of 123402210440 is 44012204321.

It can be written as a sum of positive squares in 2 ways, for example, as 119562425284 + 3839785156 = 345778^2 + 61966^2 .

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 3 ways as a sum of consecutive naturals, for example, 1542527591 + ... + 1542527670.

Almost surely, 2^123402210440 is an apocalyptic number.

123402210440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123402210440 is an abundant number, since it is smaller than the sum of its proper divisors (154252763140).

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

123402210440 is a wasteful number, since it uses less digits than its factorization.

123402210440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3085055272 (or 3085055268 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 123402210440 its reverse (44012204321), we get a palindrome (167414414761).

The spelling of 123402210440 in words is "one hundred twenty-three billion, four hundred two million, two hundred ten thousand, four hundred forty".