409079740 has 12 divisors (see below), whose sum is σ = 859067496. Its totient is φ = 163631888.

The previous prime is 409079711. The next prime is 409079743. The reversal of 409079740 is 47970904.

It is a junction number, because it is equal to n+sod(n) for n = 409079693 and 409079702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409079743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10226974 + ... + 10227013.

It is an arithmetic number, because the mean of its divisors is an integer number (71588958).

Almost surely, 2^409079740 is an apocalyptic number.

It is an amenable number.

409079740 is an abundant number, since it is smaller than the sum of its proper divisors (449987756).

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

409079740 is a wasteful number, since it uses less digits than its factorization.

409079740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20453996 (or 20453994 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 409079740 is about 20225.7197646956. The cubic root of 409079740 is about 742.3396487763.

The spelling of 409079740 in words is "four hundred nine million, seventy-nine thousand, seven hundred forty".