30631885240 has 32 divisors (see below), whose sum is σ = 75187355760. Its totient is φ = 11138867200.

The previous prime is 30631885223. The next prime is 30631885241. The reversal of 30631885240 is 4258813603.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 30631885193 and 30631885202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30631885241) 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, 34808521 + ... + 34809400.

Almost surely, 2^30631885240 is an apocalyptic number.

It is an amenable number.

30631885240 is an abundant number, since it is smaller than the sum of its proper divisors (44555470520).

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

30631885240 is a wasteful number, since it uses less digits than its factorization.

30631885240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69617943 (or 69617939 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 30631885240 in words is "thirty billion, six hundred thirty-one million, eight hundred eighty-five thousand, two hundred forty".