775494720 has 672 divisors, whose sum is σ = 3594689280. Its totient is φ = 148193280.

The previous prime is 775494697. The next prime is 775494721. The reversal of 775494720 is 27494577.

It is a tau number, because it is divible by the number of its divisors (672).

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 (775494721) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2882746 + ... + 2883014.

It is an arithmetic number, because the mean of its divisors is an integer number (5349240).

Almost surely, 2^775494720 is an apocalyptic number.

775494720 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 775494720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1797344640).

775494720 is an abundant number, since it is smaller than the sum of its proper divisors (2819194560).

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

775494720 is a wasteful number, since it uses less digits than its factorization.

775494720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 45.

The square root of 775494720 is about 27847.7058301039. The cubic root of 775494720 is about 918.7406840649.

The spelling of 775494720 in words is "seven hundred seventy-five million, four hundred ninety-four thousand, seven hundred twenty".