74340138 has 16 divisors (see below), whose sum is σ = 149209056. Its totient is φ = 24691920.

The previous prime is 74340131. The next prime is 74340157. The reversal of 74340138 is 83104347.

It is a super-2 number, since 2×74340138² = 11052912235718088, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74340131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20193 + ... + 23588.

It is an arithmetic number, because the mean of its divisors is an integer number (9325566).

Almost surely, 2^74340138 is an apocalyptic number.

74340138 is an abundant number, since it is smaller than the sum of its proper divisors (74868918).

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

74340138 is a wasteful number, since it uses less digits than its factorization.

74340138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44069.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 74340138 is about 8622.0727206397. The cubic root of 74340138 is about 420.4759117768.

The spelling of 74340138 in words is "seventy-four million, three hundred forty thousand, one hundred thirty-eight".