1031120040 has 128 divisors (see below), whose sum is σ = 3289248000. Its totient is φ = 257691648.

The previous prime is 1031120011. The next prime is 1031120059. The reversal of 1031120040 is 400211301.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1031119998 and 1031120025.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 547821 + ... + 549699.

It is an arithmetic number, because the mean of its divisors is an integer number (25697250).

Almost surely, 2^1031120040 is an apocalyptic number.

1031120040 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 1031120040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1644624000).

1031120040 is an abundant number, since it is smaller than the sum of its proper divisors (2258127960).

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

1031120040 is a wasteful number, since it uses less digits than its factorization.

1031120040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179 (or 2175 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1031120040 is about 32111.0579084527. The cubic root of 1031120040 is about 1010.2675630047.

Adding to 1031120040 its reverse (400211301), we get a palindrome (1431331341).

The spelling of 1031120040 in words is "one billion, thirty-one million, one hundred twenty thousand, forty".