408253540 has 12 divisors (see below), whose sum is σ = 857332476. Its totient is φ = 163301408.

The previous prime is 408253507. The next prime is 408253543. The reversal of 408253540 is 45352804.

It can be written as a sum of positive squares in 2 ways, for example, as 312370276 + 95883264 = 17674^2 + 9792^2 .

It is not an unprimeable number, because it can be changed into a prime (408253543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10206319 + ... + 10206358.

It is an arithmetic number, because the mean of its divisors is an integer number (71444373).

Almost surely, 2^408253540 is an apocalyptic number.

It is an amenable number.

408253540 is an abundant number, since it is smaller than the sum of its proper divisors (449078936).

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

408253540 is a wasteful number, since it uses less digits than its factorization.

408253540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20412686 (or 20412684 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 408253540 is about 20205.2849522099. The cubic root of 408253540 is about 741.8395552568.

The spelling of 408253540 in words is "four hundred eight million, two hundred fifty-three thousand, five hundred forty".