1028070720 has 84 divisors (see below), whose sum is σ = 3536144820. Its totient is φ = 274151424.

The previous prime is 1028070683. The next prime is 1028070731. The reversal of 1028070720 is 270708201.

It can be written as a sum of positive squares in 2 ways, for example, as 493906176 + 534164544 = 22224^2 + 23112^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 175605 + ... + 181364.

Almost surely, 2^1028070720 is an apocalyptic number.

1028070720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1028070720 is an abundant number, since it is smaller than the sum of its proper divisors (2508074100).

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

1028070720 is a wasteful number, since it uses less digits than its factorization.

1028070720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356992 (or 356979 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 1028070720 is about 32063.5419128954. The cubic root of 1028070720 is about 1009.2706952832.

Adding to 1028070720 its reverse (270708201), we get a palindrome (1298778921).

The spelling of 1028070720 in words is "one billion, twenty-eight million, seventy thousand, seven hundred twenty".