1051330440 has 128 divisors (see below), whose sum is σ = 3230668800. Its totient is φ = 273611520.

The previous prime is 1051330429. The next prime is 1051330463. The reversal of 1051330440 is 440331501.

It is a super-2 number, since 2×1051330440² = 2210591388141187200, which contains 22 as substring.

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, 1153585 + ... + 1154495.

It is an arithmetic number, because the mean of its divisors is an integer number (25239600).

Almost surely, 2^1051330440 is an apocalyptic number.

1051330440 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 1051330440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1615334400).

1051330440 is an abundant number, since it is smaller than the sum of its proper divisors (2179338360).

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

1051330440 is a wasteful number, since it uses less digits than its factorization.

1051330440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147 (or 1143 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1051330440 is about 32424.2261280050. The cubic root of 1051330440 is about 1016.8254627291.

Adding to 1051330440 its reverse (440331501), we get a palindrome (1491661941).

The spelling of 1051330440 in words is "one billion, fifty-one million, three hundred thirty thousand, four hundred forty".