409057078 has 4 divisors (see below), whose sum is σ = 613585620. Its totient is φ = 204528538.

The previous prime is 409057073. The next prime is 409057079. The reversal of 409057078 is 870750904.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 409057078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409057073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102264268 + ... + 102264271.

It is an arithmetic number, because the mean of its divisors is an integer number (153396405).

Almost surely, 2^409057078 is an apocalyptic number.

409057078 is a deficient number, since it is larger than the sum of its proper divisors (204528542).

409057078 is a wasteful number, since it uses less digits than its factorization.

409057078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204528541.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 409057078 is about 20225.1595296551. The cubic root of 409057078 is about 742.3259405998.

The spelling of 409057078 in words is "four hundred nine million, fifty-seven thousand, seventy-eight".