783890145 has 24 divisors (see below), whose sum is σ = 1438670376. Its totient is φ = 393481728.

The previous prime is 783890143. The next prime is 783890171. The reversal of 783890145 is 541098387.

783890145 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 202549824 + 581340321 = 14232^2 + 24111^2 .

It is not a de Polignac number, because 783890145 - 2¹ = 783890143 is a prime.

It is a super-2 number, since 2×783890145² = 1228967518856242050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 783890145.

It is not an unprimeable number, because it can be changed into a prime (783890141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 511582 + ... + 513111.

It is an arithmetic number, because the mean of its divisors is an integer number (59944599).

Almost surely, 2^783890145 is an apocalyptic number.

It is an amenable number.

783890145 is a deficient number, since it is larger than the sum of its proper divisors (654780231).

783890145 is a wasteful number, since it uses less digits than its factorization.

783890145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024721 (or 1024718 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 783890145 is about 27998.0382348478. The cubic root of 783890145 is about 922.0441884171.

The spelling of 783890145 in words is "seven hundred eighty-three million, eight hundred ninety thousand, one hundred forty-five".