785380445 has 18 divisors (see below), whose sum is σ = 960307614. Its totient is φ = 616623600.

The previous prime is 785380417. The next prime is 785380457. The reversal of 785380445 is 544083587.

It can be written as a sum of positive squares in only one way, i.e., 628304356 + 157076089 = 25066^2 + 12533^2 .

It is not a de Polignac number, because 785380445 - 2²² = 781186141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 785380396 and 785380405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5201120 + ... + 5201270.

It is an arithmetic number, because the mean of its divisors is an integer number (53350423).

Almost surely, 2^785380445 is an apocalyptic number.

It is an amenable number.

785380445 is a deficient number, since it is larger than the sum of its proper divisors (174927169).

785380445 is an frugal number, since it uses more digits than its factorization.

785380445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 44.

The square root of 785380445 is about 28024.6399620049. The cubic root of 785380445 is about 922.6281361266.

The spelling of 785380445 in words is "seven hundred eighty-five million, three hundred eighty thousand, four hundred forty-five".