775032420 has 96 divisors (see below), whose sum is σ = 2312110080. Its totient is φ = 193415040.

The previous prime is 775032383. The next prime is 775032443. The reversal of 775032420 is 24230577.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 90525 + ... + 98715.

It is an arithmetic number, because the mean of its divisors is an integer number (24084480).

Almost surely, 2^775032420 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 775032420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1156055040).

775032420 is an abundant number, since it is smaller than the sum of its proper divisors (1537077660).

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

775032420 is a wasteful number, since it uses less digits than its factorization.

775032420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8305 (or 8303 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 775032420 is about 27839.4040884499. The cubic root of 775032420 is about 918.5580831028.

Adding to 775032420 its reverse (24230577), we get a palindrome (799262997).

The spelling of 775032420 in words is "seven hundred seventy-five million, thirty-two thousand, four hundred twenty".