631020484428 has 48 divisors (see below), whose sum is σ = 1565386373376. Its totient is φ = 197398801600.

The previous prime is 631020484427. The next prime is 631020484483. The reversal of 631020484428 is 824484020136.

It is a happy number.

631020484428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×631020484428³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 631020484428.

It is not an unprimeable number, because it can be changed into a prime (631020484427) 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, 21554298 + ... + 21583553.

It is an arithmetic number, because the mean of its divisors is an integer number (32612216112).

Almost surely, 2^631020484428 is an apocalyptic number.

It is an amenable number.

631020484428 is an abundant number, since it is smaller than the sum of its proper divisors (934365888948).

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

631020484428 is a wasteful number, since it uses less digits than its factorization.

631020484428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43137934 (or 43137932 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 42.

The spelling of 631020484428 in words is "six hundred thirty-one billion, twenty million, four hundred eighty-four thousand, four hundred twenty-eight".