40352731 has 4 divisors (see below), whose sum is σ = 41654464. Its totient is φ = 39051000.

The previous prime is 40352729. The next prime is 40352771. The reversal of 40352731 is 13725304.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40352731 - 2¹ = 40352729 is a prime.

It is a super-2 number, since 2×40352731² = 3256685798316722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40352696 and 40352705.

It is not an unprimeable number, because it can be changed into a prime (40352771) 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, 650820 + ... + 650881.

It is an arithmetic number, because the mean of its divisors is an integer number (10413616).

Almost surely, 2^40352731 is an apocalyptic number.

40352731 is a deficient number, since it is larger than the sum of its proper divisors (1301733).

40352731 is a wasteful number, since it uses less digits than its factorization.

40352731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301732.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 40352731 is about 6352.3799477046. The cubic root of 40352731 is about 342.9975180230.

The spelling of 40352731 in words is "forty million, three hundred fifty-two thousand, seven hundred thirty-one".