1631036540 has 72 divisors (see below), whose sum is σ = 3999148272. Its totient is φ = 557141760.

The previous prime is 1631036507. The next prime is 1631036549. The reversal of 1631036540 is 456301361.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631036549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 274400 + ... + 280280.

It is an arithmetic number, because the mean of its divisors is an integer number (55543726).

Almost surely, 2^1631036540 is an apocalyptic number.

1631036540 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 1631036540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1999574136).

1631036540 is an abundant number, since it is smaller than the sum of its proper divisors (2368111732).

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

1631036540 is a wasteful number, since it uses less digits than its factorization.

1631036540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6187 (or 6178 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 1631036540 is about 40386.0933985945. The cubic root of 1631036540 is about 1177.1213321930.

The spelling of 1631036540 in words is "one billion, six hundred thirty-one million, thirty-six thousand, five hundred forty".