1070345728 has 40 divisors (see below), whose sum is σ = 2146605912. Its totient is φ = 533170176.

The previous prime is 1070345699. The next prime is 1070345747. The reversal of 1070345728 is 8275430701.

It is a super-2 number, since 2×1070345728² = 2291279954895699968, which contains 22 as substring.

It is a congruent number.

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, 138051 + ... + 145597.

Almost surely, 2^1070345728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1070345728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1073302956).

1070345728 is an abundant number, since it is smaller than the sum of its proper divisors (1076260184).

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

1070345728 is an frugal number, since it uses more digits than its factorization.

1070345728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7842 (or 7826 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 1070345728 is about 32716.1386474627. The cubic root of 1070345728 is about 1022.9192699546.

The spelling of 1070345728 in words is "one billion, seventy million, three hundred forty-five thousand, seven hundred twenty-eight".