745778 has 16 divisors (see below), whose sum is σ = 1235520. Its totient is φ = 334800.

The previous prime is 745757. The next prime is 745817. The reversal of 745778 is 877547.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2243 + ... + 2553.

It is an arithmetic number, because the mean of its divisors is an integer number (77220).

2⁷⁴⁵⁷⁷⁸ is an apocalyptic number.

745778 is a deficient number, since it is larger than the sum of its proper divisors (489742).

745778 is a wasteful number, since it uses less digits than its factorization.

745778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433.

The product of its digits is 54880, while the sum is 38.

The square root of 745778 is about 863.5843907807. The cubic root of 745778 is about 90.6852224372.

Subtracting 745778 from its reverse (877547), we obtain a square (131769 = 363²).

The spelling of 745778 in words is "seven hundred forty-five thousand, seven hundred seventy-eight".