749945520 has 80 divisors (see below), whose sum is σ = 2583153120. Its totient is φ = 199984896.

The previous prime is 749945507. The next prime is 749945527. The reversal of 749945520 is 25549947.

749945520 is a `hidden beast` number, since 7 + 4 + 9 + 94 + 552 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

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 (749945527) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 171439 + ... + 175758.

It is an arithmetic number, because the mean of its divisors is an integer number (32289414).

Almost surely, 2^749945520 is an apocalyptic number.

It is an amenable number.

749945520 is an abundant number, since it is smaller than the sum of its proper divisors (1833207600).

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

749945520 is a wasteful number, since it uses less digits than its factorization.

749945520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347219 (or 347207 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The square root of 749945520 is about 27385.1331930301. The cubic root of 749945520 is about 908.5382966101.

The spelling of 749945520 in words is "seven hundred forty-nine million, nine hundred forty-five thousand, five hundred twenty".