1050721780 has 24 divisors (see below), whose sum is σ = 2207590560. Its totient is φ = 420084000.

The previous prime is 1050721759. The next prime is 1050721783. The reversal of 1050721780 is 871270501.

It is a happy number.

It is a super-2 number, since 2×1050721780² = 2208032517932736800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1050721783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33351 + ... + 56689.

It is an arithmetic number, because the mean of its divisors is an integer number (91982940).

Almost surely, 2^1050721780 is an apocalyptic number.

1050721780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1050721780 is an abundant number, since it is smaller than the sum of its proper divisors (1156868780).

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

1050721780 is a wasteful number, since it uses less digits than its factorization.

1050721780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25599 (or 25597 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 1050721780 is about 32414.8388859177. The cubic root of 1050721780 is about 1016.6291969827.

It can be divided in two parts, 1050721 and 780, that added together give a palindrome (1051501).

The spelling of 1050721780 in words is "one billion, fifty million, seven hundred twenty-one thousand, seven hundred eighty".