1051918140 has 384 divisors, whose sum is σ = 3843883008. Its totient is φ = 209018880.

The previous prime is 1051918123. The next prime is 1051918169. The reversal of 1051918140 is 418191501.

It is a happy number.

It is a super-2 number, since 2×1051918140² = 2213063546522119200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1051918098 and 1051918107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8282757 + ... + 8282883.

It is an arithmetic number, because the mean of its divisors is an integer number (10010112).

Almost surely, 2^1051918140 is an apocalyptic number.

1051918140 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 1051918140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1921941504).

1051918140 is an abundant number, since it is smaller than the sum of its proper divisors (2791964868).

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

1051918140 is a wasteful number, since it uses less digits than its factorization.

1051918140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 30.

The square root of 1051918140 is about 32433.2875299437. The cubic root of 1051918140 is about 1017.0148979389.

The spelling of 1051918140 in words is "one billion, fifty-one million, nine hundred eighteen thousand, one hundred forty".