764252440 has 32 divisors (see below), whose sum is σ = 1965221280. Its totient is φ = 262029312.

The previous prime is 764252431. The next prime is 764252453. The reversal of 764252440 is 44252467.

It is a junction number, because it is equal to n+sod(n) for n = 764252396 and 764252405.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1364457 + ... + 1365016.

It is an arithmetic number, because the mean of its divisors is an integer number (61413165).

Almost surely, 2^764252440 is an apocalyptic number.

764252440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

764252440 is an abundant number, since it is smaller than the sum of its proper divisors (1200968840).

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

764252440 is a wasteful number, since it uses less digits than its factorization.

764252440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2729491 (or 2729487 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 34.

The square root of 764252440 is about 27645.1160243541. The cubic root of 764252440 is about 914.2794211341.

The spelling of 764252440 in words is "seven hundred sixty-four million, two hundred fifty-two thousand, four hundred forty".