745409736 has 128 divisors (see below), whose sum is σ = 2161152000. Its totient is φ = 237758976.

The previous prime is 745409723. The next prime is 745409837. The reversal of 745409736 is 637904547.

745409736 is a `hidden beast` number, since 74 + 540 + 9 + 7 + 36 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 745409691 and 745409700.

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 31 ways as a sum of consecutive naturals, for example, 795060 + ... + 795996.

It is an arithmetic number, because the mean of its divisors is an integer number (16884000).

Almost surely, 2^745409736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 745409736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080576000).

745409736 is an abundant number, since it is smaller than the sum of its proper divisors (1415742264).

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

745409736 is a wasteful number, since it uses less digits than its factorization.

745409736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108 (or 1098 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The square root of 745409736 is about 27302.1928789612. The cubic root of 745409736 is about 906.7029323969.

The spelling of 745409736 in words is "seven hundred forty-five million, four hundred nine thousand, seven hundred thirty-six".