745769520 has 60 divisors (see below), whose sum is σ = 2504545056. Its totient is φ = 198871680.

The previous prime is 745769509. The next prime is 745769561. The reversal of 745769520 is 25967547.

745769520 is a `hidden beast` number, since 74 + 57 + 6 + 9 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×745769520² = 1112344353922060800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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

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 11 ways as a sum of consecutive naturals, for example, 517176 + ... + 518615.

Almost surely, 2^745769520 is an apocalyptic number.

It is an amenable number.

745769520 is an abundant number, since it is smaller than the sum of its proper divisors (1758775536).

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

745769520 is a wasteful number, since it uses less digits than its factorization.

745769520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035810 (or 1035801 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The square root of 745769520 is about 27308.7810053836. The cubic root of 745769520 is about 906.8487871850.

The spelling of 745769520 in words is "seven hundred forty-five million, seven hundred sixty-nine thousand, five hundred twenty".