745132644 has 36 divisors (see below), whose sum is σ = 1994327244. Its totient is φ = 233766912.

The previous prime is 745132643. The next prime is 745132667. The reversal of 745132644 is 446231547.

745132644 is a `hidden beast` number, since 7 + 4 + 5 + 1 + 3 + 2 + 644 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 385651044 + 359481600 = 19638^2 + 18960^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 745132599 and 745132608.

It is not an unprimeable number, because it can be changed into a prime (745132643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 608157 + ... + 609380.

It is an arithmetic number, because the mean of its divisors is an integer number (55397979).

Almost surely, 2^745132644 is an apocalyptic number.

It is an amenable number.

745132644 is an abundant number, since it is smaller than the sum of its proper divisors (1249194600).

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

745132644 is a wasteful number, since it uses less digits than its factorization.

745132644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217564 (or 1217559 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 745132644 is about 27297.1178698411. The cubic root of 745132644 is about 906.5905685723.

The spelling of 745132644 in words is "seven hundred forty-five million, one hundred thirty-two thousand, six hundred forty-four".