749731680 has 96 divisors (see below), whose sum is σ = 2624076000. Its totient is φ = 199927296.

The previous prime is 749731649. The next prime is 749731691. The reversal of 749731680 is 86137947.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82455 + ... + 91094.

It is an arithmetic number, because the mean of its divisors is an integer number (27334125).

Almost surely, 2^749731680 is an apocalyptic number.

It is an amenable number.

749731680 is an abundant number, since it is smaller than the sum of its proper divisors (1874344320).

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

749731680 is a wasteful number, since it uses less digits than its factorization.

749731680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173573 (or 173559 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 749731680 is about 27381.2286064742. The cubic root of 749731680 is about 908.4519346487.

The spelling of 749731680 in words is "seven hundred forty-nine million, seven hundred thirty-one thousand, six hundred eighty".