1055861730 has 432 divisors, whose sum is σ = 3769496640. Its totient is φ = 207852480.

The previous prime is 1055861659. The next prime is 1055861747. The reversal of 1055861730 is 371685501.

1055861730 is a `hidden beast` number, since 1 + 0 + 5 + 5 + 8 + 617 + 30 = 666.

It is a super-2 number, since 2×1055861730² = 2229687985757185800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 55571661 + ... + 55571679.

Almost surely, 2^1055861730 is an apocalyptic number.

1055861730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1055861730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1884748320).

1055861730 is an abundant number, since it is smaller than the sum of its proper divisors (2713634910).

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

1055861730 is an equidigital number, since it uses as much as digits as its factorization.

1055861730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 1055861730 is about 32494.0260663403. The cubic root of 1055861730 is about 1018.2842261883.

The spelling of 1055861730 in words is "one billion, fifty-five million, eight hundred sixty-one thousand, seven hundred thirty".