1026120720 has 40 divisors (see below), whose sum is σ = 3180974976. Its totient is φ = 273632128.

The previous prime is 1026120713. The next prime is 1026120721. The reversal of 1026120720 is 270216201.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1026120721) 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, 2137512 + ... + 2137991.

Almost surely, 2^1026120720 is an apocalyptic number.

1026120720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1026120720 is an abundant number, since it is smaller than the sum of its proper divisors (2154854256).

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

1026120720 is a wasteful number, since it uses less digits than its factorization.

1026120720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4275519 (or 4275513 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1026120720 is about 32033.1191113198. The cubic root of 1026120720 is about 1008.6321777662.

Adding to 1026120720 its reverse (270216201), we get a palindrome (1296336921).

The spelling of 1026120720 in words is "one billion, twenty-six million, one hundred twenty thousand, seven hundred twenty".