775299240 has 96 divisors (see below), whose sum is σ = 2526750720. Its totient is φ = 206169984.

The previous prime is 775299223. The next prime is 775299241. The reversal of 775299240 is 42992577.

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

It is not an unprimeable number, because it can be changed into a prime (775299241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135069 + ... + 140691.

It is an arithmetic number, because the mean of its divisors is an integer number (26320320).

Almost surely, 2^775299240 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 775299240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1263375360).

775299240 is an abundant number, since it is smaller than the sum of its proper divisors (1751451480).

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

775299240 is a wasteful number, since it uses less digits than its factorization.

775299240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6023 (or 6016 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 775299240 is about 27844.1958045119. The cubic root of 775299240 is about 918.6634815099.

The spelling of 775299240 in words is "seven hundred seventy-five million, two hundred ninety-nine thousand, two hundred forty".