401838720 has 256 divisors, whose sum is σ = 1347770880. Its totient is φ = 101744640.

The previous prime is 401838713. The next prime is 401838721. The reversal of 401838720 is 27838104.

It is a super-2 number, since 2×401838720² = 322948713782476800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401838721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5504604 + ... + 5504676.

It is an arithmetic number, because the mean of its divisors is an integer number (5264730).

Almost surely, 2^401838720 is an apocalyptic number.

401838720 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 401838720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (673885440).

401838720 is an abundant number, since it is smaller than the sum of its proper divisors (945932160).

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

401838720 is a wasteful number, since it uses less digits than its factorization.

401838720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 401838720 is about 20045.9152946429. The cubic root of 401838720 is about 737.9335579611.

The spelling of 401838720 in words is "four hundred one million, eight hundred thirty-eight thousand, seven hundred twenty".