775218240 has 336 divisors, whose sum is σ = 2903646720. Its totient is φ = 189112320.

The previous prime is 775218239. The next prime is 775218251. The reversal of 775218240 is 42812577.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 775218195 and 775218204.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1696092 + ... + 1696548.

Almost surely, 2^775218240 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 775218240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451823360).

775218240 is an abundant number, since it is smaller than the sum of its proper divisors (2128428480).

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

775218240 is a wasteful number, since it uses less digits than its factorization.

775218240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 775218240 is about 27842.7412443531. The cubic root of 775218240 is about 918.6314876983.

The spelling of 775218240 in words is "seven hundred seventy-five million, two hundred eighteen thousand, two hundred forty".