404578991808 has 420 divisors, whose sum is σ = 1302049721016. Its totient is φ = 123785625600.

The previous prime is 404578991771. The next prime is 404578991833. The reversal of 404578991808 is 808199875404.

404578991808 is a `hidden beast` number, since 40 + 4 + 578 + 9 + 9 + 18 + 0 + 8 = 666.

It is a super-2 number, since 2×404578991808² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 148141803 + ... + 148144533.

Almost surely, 2^404578991808 is an apocalyptic number.

404578991808 is a gapful number since it is divisible by the number (48) 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 404578991808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (651024860508).

404578991808 is an abundant number, since it is smaller than the sum of its proper divisors (897470729208).

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

404578991808 is a wasteful number, since it uses less digits than its factorization.

404578991808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2854 (or 2794 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 63.

The spelling of 404578991808 in words is "four hundred four billion, five hundred seventy-eight million, nine hundred ninety-one thousand, eight hundred eight".