745238688 has 24 divisors (see below), whose sum is σ = 1956251808. Its totient is φ = 248412864.

The previous prime is 745238621. The next prime is 745238693. The reversal of 745238688 is 886832547.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×745238688² = 1110761404183922688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 745238688.

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 3 ways as a sum of consecutive naturals, for example, 3881356 + ... + 3881547.

It is an arithmetic number, because the mean of its divisors is an integer number (81510492).

Almost surely, 2^745238688 is an apocalyptic number.

It is an amenable number.

745238688 is an abundant number, since it is smaller than the sum of its proper divisors (1211013120).

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

745238688 is a wasteful number, since it uses less digits than its factorization.

745238688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7762916 (or 7762908 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 51.

The square root of 745238688 is about 27299.0602036041. The cubic root of 745238688 is about 906.6335738594.

The spelling of 745238688 in words is "seven hundred forty-five million, two hundred thirty-eight thousand, six hundred eighty-eight".