74140731 has 16 divisors (see below), whose sum is σ = 125529600. Its totient is φ = 42366024.

The previous prime is 74140727. The next prime is 74140783. The reversal of 74140731 is 13704147.

It is not a de Polignac number, because 74140731 - 2² = 74140727 is a prime.

It is a super-2 number, since 2×74140731² = 10993695986428722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 74140695 and 74140704.

It is not an unprimeable number, because it can be changed into a prime (74140531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195951 + ... + 196328.

It is an arithmetic number, because the mean of its divisors is an integer number (7845600).

Almost surely, 2^74140731 is an apocalyptic number.

74140731 is a deficient number, since it is larger than the sum of its proper divisors (51388869).

74140731 is a wasteful number, since it uses less digits than its factorization.

74140731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392295 (or 392289 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 74140731 is about 8610.5012049241. The cubic root of 74140731 is about 420.0996192267.

Adding to 74140731 its reverse (13704147), we get a palindrome (87844878).

The spelling of 74140731 in words is "seventy-four million, one hundred forty thousand, seven hundred thirty-one".