404166840 has 512 divisors, whose sum is σ = 1672151040. Its totient is φ = 75571200.

The previous prime is 404166797. The next prime is 404166853. The reversal of 404166840 is 48661404.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4869439 + ... + 4869521.

It is an arithmetic number, because the mean of its divisors is an integer number (3265920).

Almost surely, 2^404166840 is an apocalyptic number.

404166840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404166840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (836075520).

404166840 is an abundant number, since it is smaller than the sum of its proper divisors (1267984200).

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

404166840 is a wasteful number, since it uses less digits than its factorization.

404166840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 404166840 is about 20103.9011139629. The cubic root of 404166840 is about 739.3559285055.

The spelling of 404166840 in words is "four hundred four million, one hundred sixty-six thousand, eight hundred forty".