401402880 has 264 divisors, whose sum is σ = 1440825984. Its totient is φ = 103219200.

The previous prime is 401402839. The next prime is 401402909. The reversal of 401402880 is 88204104.

It is a super-2 number, since 2×401402880² = 322248544144588800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1428340 + ... + 1428620.

Almost surely, 2^401402880 is an apocalyptic number.

401402880 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 401402880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (720412992).

401402880 is an abundant number, since it is smaller than the sum of its proper divisors (1039423104).

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

401402880 is a wasteful number, since it uses less digits than its factorization.

401402880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 401402880 is about 20035.0413026777. The cubic root of 401402880 is about 737.6666703648. Note that the first 4 decimals are identical.

Adding to 401402880 its reverse (88204104), we get a palindrome (489606984).

The spelling of 401402880 in words is "four hundred one million, four hundred two thousand, eight hundred eighty".