785401057 has 16 divisors (see below), whose sum is σ = 917440000. Its totient is φ = 672084000.

The previous prime is 785401051. The next prime is 785401069. The reversal of 785401057 is 750104587.

It is not a de Polignac number, because 785401057 - 2³ = 785401049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (785401051) 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 15 ways as a sum of consecutive naturals, for example, 256069 + ... + 259117.

It is an arithmetic number, because the mean of its divisors is an integer number (57340000).

Almost surely, 2^785401057 is an apocalyptic number.

It is an amenable number.

785401057 is a deficient number, since it is larger than the sum of its proper divisors (132038943).

785401057 is an equidigital number, since it uses as much as digits as its factorization.

785401057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3821 (or 3807 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 785401057 is about 28025.0077074030. The cubic root of 785401057 is about 922.6362073931.

It can be divided in two parts, 78540 and 1057, that added together give a palindrome (79597).

The spelling of 785401057 in words is "seven hundred eighty-five million, four hundred one thousand, fifty-seven".