123431430 has 32 divisors (see below), whose sum is σ = 299570400. Its totient is φ = 32544512.

The previous prime is 123431401. The next prime is 123431431. The reversal of 123431430 is 34134321.

It is a junction number, because it is equal to n+sod(n) for n = 123431397 and 123431406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123431431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20445 + ... + 25784.

It is an arithmetic number, because the mean of its divisors is an integer number (9361575).

Almost surely, 2^123431430 is an apocalyptic number.

123431430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123431430 is an abundant number, since it is smaller than the sum of its proper divisors (176138970).

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

123431430 is a wasteful number, since it uses less digits than its factorization.

123431430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46328.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 123431430 is about 11109.9698469438. The cubic root of 123431430 is about 497.8997637005.

Adding to 123431430 its reverse (34134321), we get a palindrome (157565751).

The spelling of 123431430 in words is "one hundred twenty-three million, four hundred thirty-one thousand, four hundred thirty".