775372640 has 48 divisors (see below), whose sum is σ = 2093509152. Its totient is φ = 265841664.

The previous prime is 775372627. The next prime is 775372649. The reversal of 775372640 is 46273577.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775372649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345029 + ... + 347268.

It is an arithmetic number, because the mean of its divisors is an integer number (43614774).

Almost surely, 2^775372640 is an apocalyptic number.

775372640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

775372640 is an abundant number, since it is smaller than the sum of its proper divisors (1318136512).

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

775372640 is a wasteful number, since it uses less digits than its factorization.

775372640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692319 (or 692311 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 41.

The square root of 775372640 is about 27845.5138217990. The cubic root of 775372640 is about 918.6924715085.

The spelling of 775372640 in words is "seven hundred seventy-five million, three hundred seventy-two thousand, six hundred forty".