401784012 has 72 divisors (see below), whose sum is σ = 1185440256. Its totient is φ = 112349664.

The previous prime is 401784011. The next prime is 401784077. The reversal of 401784012 is 210487104.

It is a super-2 number, since 2×401784012² = 322860784597632288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401784011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5118 + ... + 28805.

It is an arithmetic number, because the mean of its divisors is an integer number (16464448).

Almost surely, 2^401784012 is an apocalyptic number.

401784012 is a gapful number since it is divisible by the number (42) 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 401784012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (592720128).

401784012 is an abundant number, since it is smaller than the sum of its proper divisors (783656244).

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

401784012 is a wasteful number, since it uses less digits than its factorization.

401784012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33987 (or 33982 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 401784012 is about 20044.5506809207. The cubic root of 401784012 is about 737.9000679900.

The spelling of 401784012 in words is "four hundred one million, seven hundred eighty-four thousand, twelve".