745449648 has 40 divisors (see below), whose sum is σ = 2027102400. Its totient is φ = 235404864.

The previous prime is 745449641. The next prime is 745449689. The reversal of 745449648 is 846944547.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 745449648.

It is not an unprimeable number, because it can be changed into a prime (745449641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407778 + ... + 409601.

It is an arithmetic number, because the mean of its divisors is an integer number (50677560).

Almost surely, 2^745449648 is an apocalyptic number.

It is an amenable number.

745449648 is an abundant number, since it is smaller than the sum of its proper divisors (1281652752).

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

745449648 is a wasteful number, since it uses less digits than its factorization.

745449648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817409 (or 817403 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 51.

The square root of 745449648 is about 27302.9237994761. The cubic root of 745449648 is about 906.7191148533.

The spelling of 745449648 in words is "seven hundred forty-five million, four hundred forty-nine thousand, six hundred forty-eight".