40332729 has 4 divisors (see below), whose sum is σ = 53776976. Its totient is φ = 26888484.

The previous prime is 40332689. The next prime is 40332737. The reversal of 40332729 is 92723304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40332729 - 2¹² = 40328633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40332696 and 40332705.

It is not an unprimeable number, because it can be changed into a prime (40332769) 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, 6722119 + ... + 6722124.

It is an arithmetic number, because the mean of its divisors is an integer number (13444244).

Almost surely, 2^40332729 is an apocalyptic number.

It is an amenable number.

40332729 is a deficient number, since it is larger than the sum of its proper divisors (13444247).

40332729 is a wasteful number, since it uses less digits than its factorization.

40332729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13444246.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 40332729 is about 6350.8053819968. The cubic root of 40332729 is about 342.9408364382.

The spelling of 40332729 in words is "forty million, three hundred thirty-two thousand, seven hundred twenty-nine".