1789700640 has 192 divisors, whose sum is σ = 6938701056. Its totient is φ = 377597952.

The previous prime is 1789700629. The next prime is 1789700641. The reversal of 1789700640 is 460079871.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1789700592 and 1789700601.

It is not an unprimeable number, because it can be changed into a prime (1789700641) 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 31 ways as a sum of consecutive naturals, for example, 23194 + ... + 64166.

It is an arithmetic number, because the mean of its divisors is an integer number (36139068).

Almost surely, 2^1789700640 is an apocalyptic number.

1789700640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1789700640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3469350528).

1789700640 is an abundant number, since it is smaller than the sum of its proper divisors (5149000416).

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

1789700640 is a wasteful number, since it uses less digits than its factorization.

1789700640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41011 (or 41003 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 1789700640 is about 42304.8536222500. The cubic root of 1789700640 is about 1214.1158566298.

The spelling of 1789700640 in words is "one billion, seven hundred eighty-nine million, seven hundred thousand, six hundred forty".