631040136 has 64 divisors (see below), whose sum is σ = 1709294400. Its totient is φ = 193363968.

The previous prime is 631040129. The next prime is 631040147.

631040136 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 441 + ... + 35528.

It is an arithmetic number, because the mean of its divisors is an integer number (26707725).

Almost surely, 2^631040136 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 631040136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (854647200).

631040136 is an abundant number, since it is smaller than the sum of its proper divisors (1078254264).

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

631040136 is a wasteful number, since it uses less digits than its factorization.

631040136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36038 (or 36034 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 631040136 is about 25120.5122559234. The cubic root of 631040136 is about 857.7334113440.

The spelling of 631040136 in words is "six hundred thirty-one million, forty thousand, one hundred thirty-six".