1055117784 has 192 divisors, whose sum is σ = 3290997600. Its totient is φ = 280068096.

The previous prime is 1055117783. The next prime is 1055117797. The reversal of 1055117784 is 4877115501.

It is a super-2 number, since 2×1055117784² = 2226547076226141312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055117783) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1778992 + ... + 1779584.

Almost surely, 2^1055117784 is an apocalyptic number.

1055117784 is a gapful number since it is divisible by the number (14) 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 1055117784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1645498800).

1055117784 is an abundant number, since it is smaller than the sum of its proper divisors (2235879816).

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

1055117784 is a wasteful number, since it uses less digits than its factorization.

1055117784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 39.

The square root of 1055117784 is about 32482.5766219369. The cubic root of 1055117784 is about 1018.0450135324.

The spelling of 1055117784 in words is "one billion, fifty-five million, one hundred seventeen thousand, seven hundred eighty-four".