1055247840 has 144 divisors (see below), whose sum is σ = 3790659600. Its totient is φ = 266582016.

The previous prime is 1055247811. The next prime is 1055247877. The reversal of 1055247840 is 487425501.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×1055247840² = 2227096007649331200, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1055247795 and 1055247804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8076 + ... + 46644.

It is an arithmetic number, because the mean of its divisors is an integer number (26324025).

Almost surely, 2^1055247840 is an apocalyptic number.

1055247840 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 1055247840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1895329800).

1055247840 is an abundant number, since it is smaller than the sum of its proper divisors (2735411760).

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

1055247840 is a wasteful number, since it uses less digits than its factorization.

1055247840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38609 (or 38598 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The square root of 1055247840 is about 32484.5784950336. The cubic root of 1055247840 is about 1018.0868405918.

The spelling of 1055247840 in words is "one billion, fifty-five million, two hundred forty-seven thousand, eight hundred forty".