1055133440 has 72 divisors (see below), whose sum is σ = 2595798240. Its totient is φ = 410628096.

The previous prime is 1055133439. The next prime is 1055133449. The reversal of 1055133440 is 443315501.

It is a super-2 number, since 2×1055133440² = 2226613152412467200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055133449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36221 + ... + 58499.

Almost surely, 2^1055133440 is an apocalyptic number.

1055133440 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 1055133440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1297899120).

1055133440 is an abundant number, since it is smaller than the sum of its proper divisors (1540664800).

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

1055133440 is an equidigital number, since it uses as much as digits as its factorization.

1055133440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22337 (or 22323 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1055133440 is about 32482.8176117775. The cubic root of 1055133440 is about 1018.0500488103.

Adding to 1055133440 its reverse (443315501), we get a palindrome (1498448941).

The spelling of 1055133440 in words is "one billion, fifty-five million, one hundred thirty-three thousand, four hundred forty".