40274729 has 8 divisors (see below), whose sum is σ = 44300640. Its totient is φ = 36612180.

The previous prime is 40274719. The next prime is 40274747. The reversal of 40274729 is 92747204.

It is a happy number.

It is not a de Polignac number, because 40274729 - 2⁸ = 40274473 is a prime.

It is a super-3 number, since 3×40274729³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40274719) 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, 13799 + ... + 16460.

It is an arithmetic number, because the mean of its divisors is an integer number (5537580).

Almost surely, 2^40274729 is an apocalyptic number.

It is an amenable number.

40274729 is a deficient number, since it is larger than the sum of its proper divisors (4025911).

40274729 is an equidigital number, since it uses as much as digits as its factorization.

40274729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30292 (or 30270 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 40274729 is about 6346.2373891937. The cubic root of 40274729 is about 342.7763702500.

The spelling of 40274729 in words is "forty million, two hundred seventy-four thousand, seven hundred twenty-nine".