31154350428 has 72 divisors (see below), whose sum is σ = 79911782496. Its totient is φ = 10231939200.

The previous prime is 31154350417. The next prime is 31154350429. The reversal of 31154350428 is 82405345113.

31154350428 is a `hidden beast` number, since 31 + 154 + 3 + 50 + 428 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 31154350392 and 31154350401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31154350429) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 5469550 + ... + 5475242.

It is an arithmetic number, because the mean of its divisors is an integer number (1109885868).

Almost surely, 2^31154350428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31154350428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39955891248).

31154350428 is an abundant number, since it is smaller than the sum of its proper divisors (48757432068).

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

31154350428 is a wasteful number, since it uses less digits than its factorization.

31154350428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7915 (or 7910 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 31154350428 in words is "thirty-one billion, one hundred fifty-four million, three hundred fifty thousand, four hundred twenty-eight".