406919844 has 18 divisors (see below), whose sum is σ = 1028603030. Its totient is φ = 135639936.

The previous prime is 406919833. The next prime is 406919869. The reversal of 406919844 is 448919604.

It can be written as a sum of positive squares in only one way, i.e., 363359844 + 43560000 = 19062^2 + 6600^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 406919844.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5651629 + ... + 5651700.

Almost surely, 2^406919844 is an apocalyptic number.

It is an amenable number.

406919844 is an abundant number, since it is smaller than the sum of its proper divisors (621683186).

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

406919844 is a wasteful number, since it uses less digits than its factorization.

406919844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11303339 (or 11303334 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 406919844 is about 20172.2543113059. The cubic root of 406919844 is about 741.0308520868.

The spelling of 406919844 in words is "four hundred six million, nine hundred nineteen thousand, eight hundred forty-four".