40405352 has 32 divisors (see below), whose sum is σ = 84407400. Its totient is φ = 18004224.

The previous prime is 40405349. The next prime is 40405357. The reversal of 40405352 is 25350404.

It can be written as a sum of positive squares in 4 ways, for example, as 16532356 + 23872996 = 4066^2 + 4886^2 .

It is not an unprimeable number, because it can be changed into a prime (40405357) 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, 3683 + ... + 9714.

Almost surely, 2^40405352 is an apocalyptic number.

It is an amenable number.

40405352 is an abundant number, since it is smaller than the sum of its proper divisors (44002048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40405352 is a wasteful number, since it uses less digits than its factorization.

40405352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13445 (or 13441 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 40405352 is about 6356.5204318086. The cubic root of 40405352 is about 343.1465457941.

Adding to 40405352 its reverse (25350404), we get a palindrome (65755756).

The spelling of 40405352 in words is "forty million, four hundred five thousand, three hundred fifty-two".