406525878 has 144 divisors (see below), whose sum is σ = 1041051648. Its totient is φ = 118681200.

The previous prime is 406525841. The next prime is 406525921. The reversal of 406525878 is 878525604.

406525878 is a `hidden beast` number, since 4 + 0 + 65 + 2 + 587 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1822875 + ... + 1823097.

Almost surely, 2^406525878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 406525878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (520525824).

406525878 is an abundant number, since it is smaller than the sum of its proper divisors (634525770).

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

406525878 is a wasteful number, since it uses less digits than its factorization.

406525878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The square root of 406525878 is about 20162.4869001817. The cubic root of 406525878 is about 740.7916278829.

The spelling of 406525878 in words is "four hundred six million, five hundred twenty-five thousand, eight hundred seventy-eight".