745721324 has 6 divisors (see below), whose sum is σ = 1305012324. Its totient is φ = 372860660.

The previous prime is 745721321. The next prime is 745721357. The reversal of 745721324 is 423127547.

It is a super-2 number, since 2×745721324² = 1112200586136625952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (745721321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93215162 + ... + 93215169.

It is an arithmetic number, because the mean of its divisors is an integer number (217502054).

Almost surely, 2^745721324 is an apocalyptic number.

It is an amenable number.

745721324 is a deficient number, since it is larger than the sum of its proper divisors (559291000).

745721324 is a wasteful number, since it uses less digits than its factorization.

745721324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186430335 (or 186430333 counting only the distinct ones).

The product of its digits is 47040, while the sum is 35.

The square root of 745721324 is about 27307.8985643348. The cubic root of 745721324 is about 906.8292514686.

The spelling of 745721324 in words is "seven hundred forty-five million, seven hundred twenty-one thousand, three hundred twenty-four".