409390540 has 24 divisors (see below), whose sum is σ = 925853040. Its totient is φ = 151159488.

The previous prime is 409390529. The next prime is 409390571. The reversal of 409390540 is 45093904.

It is a super-2 number, since 2×409390540² = 335201228482983200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 409390496 and 409390505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 787030 + ... + 787549.

It is an arithmetic number, because the mean of its divisors is an integer number (38577210).

Almost surely, 2^409390540 is an apocalyptic number.

It is an amenable number.

409390540 is an abundant number, since it is smaller than the sum of its proper divisors (516462500).

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

409390540 is a wasteful number, since it uses less digits than its factorization.

409390540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574601 (or 1574599 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 409390540 is about 20233.4015924164. The cubic root of 409390540 is about 742.5275997102.

The spelling of 409390540 in words is "four hundred nine million, three hundred ninety thousand, five hundred forty".