409155690 has 32 divisors (see below), whose sum is σ = 1033657920. Its totient is φ = 103365504.

The previous prime is 409155679. The next prime is 409155697. The reversal of 409155690 is 96551904.

It is a super-2 number, since 2×409155690² = 334816757318752200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (409155697) 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 15 ways as a sum of consecutive naturals, for example, 358339 + ... + 359478.

It is an arithmetic number, because the mean of its divisors is an integer number (32301810).

Almost surely, 2^409155690 is an apocalyptic number.

409155690 is an abundant number, since it is smaller than the sum of its proper divisors (624502230).

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

409155690 is a wasteful number, since it uses less digits than its factorization.

409155690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717846.

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 409155690 is about 20227.5972374378. The cubic root of 409155690 is about 742.3855870143.

The spelling of 409155690 in words is "four hundred nine million, one hundred fifty-five thousand, six hundred ninety".