74852778 has 128 divisors (see below), whose sum is σ = 204632064. Its totient is φ = 17772480.

The previous prime is 74852777. The next prime is 74852779. The reversal of 74852778 is 87725847.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (74852777) and next prime (74852779).

It is not an unprimeable number, because it can be changed into a prime (74852777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 726675 + ... + 726777.

It is an arithmetic number, because the mean of its divisors is an integer number (1598688).

Almost surely, 2^74852778 is an apocalyptic number.

74852778 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 74852778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102316032).

74852778 is an abundant number, since it is smaller than the sum of its proper divisors (129779286).

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

74852778 is a wasteful number, since it uses less digits than its factorization.

74852778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 139 counting only the distinct ones).

The product of its digits is 878080, while the sum is 48.

The square root of 74852778 is about 8651.7499963880. The cubic root of 74852778 is about 421.4402144716.

The spelling of 74852778 in words is "seventy-four million, eight hundred fifty-two thousand, seven hundred seventy-eight".