745992 has 48 divisors (see below), whose sum is σ = 2178540. Its totient is φ = 229248.

The previous prime is 745981. The next prime is 745993. The reversal of 745992 is 299547.

It can be written as a sum of positive squares in 2 ways, for example, as 715716 + 30276 = 846^2 + 174^2 .

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (745993) by changing a digit.

745992 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 538 + ... + 1334.

2⁷⁴⁵⁹⁹² is an apocalyptic number.

745992 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 745992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1089270).

745992 is an abundant number, since it is smaller than the sum of its proper divisors (1432548).

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

745992 is a wasteful number, since it uses less digits than its factorization.

745992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822 (or 815 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 745992 is about 863.7082840867. The cubic root of 745992 is about 90.6938956088.

The spelling of 745992 in words is "seven hundred forty-five thousand, nine hundred ninety-two".