1031438772 has 336 divisors, whose sum is σ = 3496200960. Its totient is φ = 260200512.

The previous prime is 1031438753. The next prime is 1031438783. The reversal of 1031438772 is 2778341301.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 44845153 + ... + 44845175.

It is an arithmetic number, because the mean of its divisors is an integer number (10405360).

Almost surely, 2^1031438772 is an apocalyptic number.

1031438772 is a gapful number since it is divisible by the number (12) 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 1031438772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1748100480).

1031438772 is an abundant number, since it is smaller than the sum of its proper divisors (2464762188).

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

1031438772 is an equidigital number, since it uses as much as digits as its factorization.

1031438772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 1031438772 is about 32116.0204882236. The cubic root of 1031438772 is about 1010.3716476943.

The spelling of 1031438772 in words is "one billion, thirty-one million, four hundred thirty-eight thousand, seven hundred seventy-two".