745274778 has 8 divisors (see below), whose sum is σ = 1490549568. Its totient is φ = 248424924.

The previous prime is 745274767. The next prime is 745274779. The reversal of 745274778 is 877472547.

It is a sphenic number, since it is the product of 3 distinct primes.

745274778 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 745274778.

It is not an unprimeable number, because it can be changed into a prime (745274779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62106226 + ... + 62106237.

It is an arithmetic number, because the mean of its divisors is an integer number (186318696).

Almost surely, 2^745274778 is an apocalyptic number.

745274778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

745274778 is a wasteful number, since it uses less digits than its factorization.

745274778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124212468.

The product of its digits is 3073280, while the sum is 51.

The square root of 745274778 is about 27299.7212073677. The cubic root of 745274778 is about 906.6482089368.

The spelling of 745274778 in words is "seven hundred forty-five million, two hundred seventy-four thousand, seven hundred seventy-eight".