1055578420 has 48 divisors (see below), whose sum is σ = 2394277200. Its totient is φ = 388601856.

The previous prime is 1055578417. The next prime is 1055578441. The reversal of 1055578420 is 248755501.

It can be written as a sum of positive squares in 8 ways, for example, as 2965284 + 1052613136 = 1722^2 + 32444^2 .

It is a super-2 number, since 2×1055578420² = 2228491601539392800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1055578420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84924 + ... + 96556.

It is an arithmetic number, because the mean of its divisors is an integer number (49880775).

Almost surely, 2^1055578420 is an apocalyptic number.

1055578420 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 1055578420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1197138600).

1055578420 is an abundant number, since it is smaller than the sum of its proper divisors (1338698780).

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

1055578420 is a wasteful number, since it uses less digits than its factorization.

1055578420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12004 (or 12002 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 37.

The square root of 1055578420 is about 32489.6663571666. Note that the first 3 decimals coincide. The cubic root of 1055578420 is about 1018.1931423205.

The spelling of 1055578420 in words is "one billion, fifty-five million, five hundred seventy-eight thousand, four hundred twenty".