74115988 has 12 divisors (see below), whose sum is σ = 137332692. Its totient is φ = 34878080.

The previous prime is 74115917. The next prime is 74115989. The reversal of 74115988 is 88951147.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 51667344 + 22448644 = 7188^2 + 4738^2 .

It is a super-2 number, since 2×74115988² = 10986359354432288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74115989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544903 + ... + 545038.

It is an arithmetic number, because the mean of its divisors is an integer number (11444391).

Almost surely, 2^74115988 is an apocalyptic number.

It is an amenable number.

74115988 is a deficient number, since it is larger than the sum of its proper divisors (63216704).

74115988 is a wasteful number, since it uses less digits than its factorization.

74115988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089962 (or 1089960 counting only the distinct ones).

The product of its digits is 80640, while the sum is 43.

The square root of 74115988 is about 8609.0642929415. The cubic root of 74115988 is about 420.0528807189.

The spelling of 74115988 in words is "seventy-four million, one hundred fifteen thousand, nine hundred eighty-eight".