1031616440 has 64 divisors (see below), whose sum is σ = 2514900960. Its totient is φ = 379330560.

The previous prime is 1031616431. The next prime is 1031616461. The reversal of 1031616440 is 446161301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11600 + ... + 46880.

Almost surely, 2^1031616440 is an apocalyptic number.

1031616440 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 1031616440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1257450480).

1031616440 is an abundant number, since it is smaller than the sum of its proper divisors (1483284520).

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

1031616440 is a wasteful number, since it uses less digits than its factorization.

1031616440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35352 (or 35348 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1031616440 is about 32118.7864029761. The cubic root of 1031616440 is about 1010.4296574081.

Adding to 1031616440 its reverse (446161301), we get a palindrome (1477777741).

The spelling of 1031616440 in words is "one billion, thirty-one million, six hundred sixteen thousand, four hundred forty".