745978 has 16 divisors (see below), whose sum is σ = 1199520. Its totient is φ = 346896.

The previous prime is 745973. The next prime is 745981. The reversal of 745978 is 879547.

It is a self number, because there is not a number n which added to its sum of digits gives 745978.

It is not an unprimeable number, because it can be changed into a prime (745973) 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, 2400 + ... + 2692.

It is an arithmetic number, because the mean of its divisors is an integer number (74970).

2⁷⁴⁵⁹⁷⁸ is an apocalyptic number.

745978 is a deficient number, since it is larger than the sum of its proper divisors (453542).

745978 is a wasteful number, since it uses less digits than its factorization.

745978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381.

The product of its digits is 70560, while the sum is 40.

The square root of 745978 is about 863.7001794604. The cubic root of 745978 is about 90.6933282558.

The spelling of 745978 in words is "seven hundred forty-five thousand, nine hundred seventy-eight".