40408450 has 12 divisors (see below), whose sum is σ = 75159810. Its totient is φ = 16163360.

The previous prime is 40408429. The next prime is 40408453. The reversal of 40408450 is 5480404.

It can be written as a sum of positive squares in 3 ways, for example, as 23011209 + 17397241 = 4797^2 + 4171^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (40408453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 404035 + ... + 404134.

Almost surely, 2^40408450 is an apocalyptic number.

40408450 is a deficient number, since it is larger than the sum of its proper divisors (34751360).

40408450 is a wasteful number, since it uses less digits than its factorization.

40408450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808181 (or 808176 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 40408450 is about 6356.7641139183. The cubic root of 40408450 is about 343.1553155963.

Adding to 40408450 its reverse (5480404), we get a palindrome (45888854).

The spelling of 40408450 in words is "forty million, four hundred eight thousand, four hundred fifty".