785128953 has 16 divisors (see below), whose sum is σ = 1200479616. Its totient is φ = 447110400.

The previous prime is 785128913. The next prime is 785128991. The reversal of 785128953 is 359821587.

It is not a de Polignac number, because 785128953 - 2⁶ = 785128889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (785128913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57648 + ... + 69953.

It is an arithmetic number, because the mean of its divisors is an integer number (75029976).

Almost surely, 2^785128953 is an apocalyptic number.

It is an amenable number.

785128953 is a deficient number, since it is larger than the sum of its proper divisors (415350663).

785128953 is a wasteful number, since it uses less digits than its factorization.

785128953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127904.

The product of its digits is 604800, while the sum is 48.

The square root of 785128953 is about 28020.1526227107. The cubic root of 785128953 is about 922.5296452749.

The spelling of 785128953 in words is "seven hundred eighty-five million, one hundred twenty-eight thousand, nine hundred fifty-three".