1051820780 has 12 divisors (see below), whose sum is σ = 2208823680. Its totient is φ = 420728304.

The previous prime is 1051820747. The next prime is 1051820839. The reversal of 1051820780 is 870281501.

It is a happy number.

It is a super-2 number, since 2×1051820780² = 2212653906479616800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26295500 + ... + 26295539.

It is an arithmetic number, because the mean of its divisors is an integer number (184068640).

Almost surely, 2^1051820780 is an apocalyptic number.

1051820780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1051820780 is an abundant number, since it is smaller than the sum of its proper divisors (1157002900).

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

1051820780 is a wasteful number, since it uses less digits than its factorization.

1051820780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52591048 (or 52591046 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 1051820780 is about 32431.7865681186. The cubic root of 1051820780 is about 1016.9835204575.

The spelling of 1051820780 in words is "one billion, fifty-one million, eight hundred twenty thousand, seven hundred eighty".