740778 has 16 divisors (see below), whose sum is σ = 1490016. Its totient is φ = 245520.

The previous prime is 740749. The next prime is 740801. The reversal of 740778 is 877047.

It is a nialpdrome in base 15.

It is an unprimeable number.

740778 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1800 + ... + 2172.

It is an arithmetic number, because the mean of its divisors is an integer number (93126).

2⁷⁴⁰⁷⁷⁸ is an apocalyptic number.

740778 is an abundant number, since it is smaller than the sum of its proper divisors (749238).

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

740778 is a wasteful number, since it uses less digits than its factorization.

740778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709.

The product of its (nonzero) digits is 10976, while the sum is 33.

The square root of 740778 is about 860.6846112253. The cubic root of 740778 is about 90.4821042522.

The spelling of 740778 in words is "seven hundred forty thousand, seven hundred seventy-eight".