74728778 has 16 divisors (see below), whose sum is σ = 116100864. Its totient is φ = 36051120.

The previous prime is 74728777. The next prime is 74728811. The reversal of 74728778 is 87782747.

It is a super-2 number, since 2×74728778² = 11168780522746568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74728777) by changing a digit.

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, 1076 + ... + 12272.

It is an arithmetic number, because the mean of its divisors is an integer number (7256304).

Almost surely, 2^74728778 is an apocalyptic number.

74728778 is a deficient number, since it is larger than the sum of its proper divisors (41372086).

74728778 is a wasteful number, since it uses less digits than its factorization.

74728778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11317.

The product of its digits is 1229312, while the sum is 50.

The square root of 74728778 is about 8644.5808458247. The cubic root of 74728778 is about 421.2073686485.

The spelling of 74728778 in words is "seventy-four million, seven hundred twenty-eight thousand, seven hundred seventy-eight".