123400434430 has 128 divisors (see below), whose sum is σ = 277602183936. Its totient is φ = 38452838400.

The previous prime is 123400434407. The next prime is 123400434461. The reversal of 123400434430 is 34434004321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 50552010 + ... + 50554450.

It is an arithmetic number, because the mean of its divisors is an integer number (2168767062).

Almost surely, 2^123400434430 is an apocalyptic number.

123400434430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123400434430 is an abundant number, since it is smaller than the sum of its proper divisors (154201749506).

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

123400434430 is a wasteful number, since it uses less digits than its factorization.

123400434430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3302.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 123400434430 its reverse (34434004321), we get a palindrome (157834438751).

The spelling of 123400434430 in words is "one hundred twenty-three billion, four hundred million, four hundred thirty-four thousand, four hundred thirty".