401628 has 12 divisors (see below), whose sum is σ = 937160. Its totient is φ = 133872.

The previous prime is 401627. The next prime is 401629. The reversal of 401628 is 826104.

401628 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (401627) and next prime (401629).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×401628² = 322610100768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16723 + ... + 16746.

2⁴⁰¹⁶²⁸ is an apocalyptic number.

It is an amenable number.

401628 is an abundant number, since it is smaller than the sum of its proper divisors (535532).

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

401628 is a wasteful number, since it uses less digits than its factorization.

401628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33476 (or 33474 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 401628 is about 633.7412721292. The cubic root of 401628 is about 73.7804547208.

The spelling of 401628 in words is "four hundred one thousand, six hundred twenty-eight".