40357631 has 4 divisors (see below), whose sum is σ = 41216352. Its totient is φ = 39498912.

The previous prime is 40357621. The next prime is 40357633. The reversal of 40357631 is 13675304.

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 40357631 - 2¹⁰ = 40356607 is a prime.

It is a super-2 number, since 2×40357631² = 3257476759864322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 40357594 and 40357603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40357633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429290 + ... + 429383.

It is an arithmetic number, because the mean of its divisors is an integer number (10304088).

Almost surely, 2^40357631 is an apocalyptic number.

40357631 is a deficient number, since it is larger than the sum of its proper divisors (858721).

40357631 is an equidigital number, since it uses as much as digits as its factorization.

40357631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858720.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 40357631 is about 6352.7656182170. The cubic root of 40357631 is about 343.0114007663.

The spelling of 40357631 in words is "forty million, three hundred fifty-seven thousand, six hundred thirty-one".