785597940 has 120 divisors (see below), whose sum is σ = 2594259360. Its totient is φ = 198459072.

The previous prime is 785597933. The next prime is 785597941. The reversal of 785597940 is 49795587.

785597940 is a `hidden beast` number, since 7 + 8 + 5 + 597 + 9 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (785597941) 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 39 ways as a sum of consecutive naturals, for example, 18019 + ... + 43541.

It is an arithmetic number, because the mean of its divisors is an integer number (21618828).

Almost surely, 2^785597940 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 785597940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1297129680).

785597940 is an abundant number, since it is smaller than the sum of its proper divisors (1808661420).

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

785597940 is a wasteful number, since it uses less digits than its factorization.

785597940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25563 (or 25552 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 54.

The square root of 785597940 is about 28028.5201179085. The cubic root of 785597940 is about 922.7132959100.

The spelling of 785597940 in words is "seven hundred eighty-five million, five hundred ninety-seven thousand, nine hundred forty".