775825830 has 128 divisors (see below), whose sum is σ = 2261952000. Its totient is φ = 188065152.

The previous prime is 775825793. The next prime is 775825837. The reversal of 775825830 is 38528577.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775825837) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 233521 + ... + 236819.

It is an arithmetic number, because the mean of its divisors is an integer number (17671500).

Almost surely, 2^775825830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 775825830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1130976000).

775825830 is an abundant number, since it is smaller than the sum of its proper divisors (1486126170).

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

775825830 is a wasteful number, since it uses less digits than its factorization.

775825830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3395 (or 3389 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The square root of 775825830 is about 27853.6502096224. The cubic root of 775825830 is about 918.8714225193.

The spelling of 775825830 in words is "seven hundred seventy-five million, eight hundred twenty-five thousand, eight hundred thirty".