31284810072 has 48 divisors (see below), whose sum is σ = 84746825280. Its totient is φ = 10426161600.

The previous prime is 31284810071. The next prime is 31284810091. The reversal of 31284810072 is 27001848213.

It is a super-2 number, since 2×31284810072² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31284810071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 337497 + ... + 420087.

It is an arithmetic number, because the mean of its divisors is an integer number (1765558860).

Almost surely, 2^31284810072 is an apocalyptic number.

It is an amenable number.

31284810072 is an abundant number, since it is smaller than the sum of its proper divisors (53462015208).

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

31284810072 is a wasteful number, since it uses less digits than its factorization.

31284810072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87864 (or 87857 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 31284810072 in words is "thirty-one billion, two hundred eighty-four million, eight hundred ten thousand, seventy-two".