30431123440 has 40 divisors (see below), whose sum is σ = 71056063728. Its totient is φ = 12120199680.

The previous prime is 30431123419. The next prime is 30431123447. The reversal of 30431123440 is 4432113403.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30431123447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 797646 + ... + 834925.

Almost surely, 2^30431123440 is an apocalyptic number.

It is an amenable number.

30431123440 is an abundant number, since it is smaller than the sum of its proper divisors (40624940288).

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

30431123440 is a wasteful number, since it uses less digits than its factorization.

30431123440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632817 (or 1632811 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 30431123440 its reverse (4432113403), we get a palindrome (34863236843).

The spelling of 30431123440 in words is "thirty billion, four hundred thirty-one million, one hundred twenty-three thousand, four hundred forty".