1631404260 has 144 divisors (see below), whose sum is σ = 5306676480. Its totient is φ = 416053440.

The previous prime is 1631404253. The next prime is 1631404261. The reversal of 1631404260 is 624041361.

1631404260 is a `hidden beast` number, since 1 + 631 + 4 + 0 + 4 + 26 + 0 = 666.

It is a super-2 number, since 2×1631404260² = 5322959719092295200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1631404261) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 282805 + ... + 288515.

It is an arithmetic number, because the mean of its divisors is an integer number (36851920).

Almost surely, 2^1631404260 is an apocalyptic number.

1631404260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1631404260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2653338240).

1631404260 is an abundant number, since it is smaller than the sum of its proper divisors (3675272220).

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

1631404260 is a wasteful number, since it uses less digits than its factorization.

1631404260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5775 (or 5744 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1631404260 is about 40390.6456992210. The cubic root of 1631404260 is about 1177.2097868905.

The spelling of 1631404260 in words is "one billion, six hundred thirty-one million, four hundred four thousand, two hundred sixty".