401056428 has 96 divisors (see below), whose sum is σ = 1023321600. Its totient is φ = 121859584.

The previous prime is 401056421. The next prime is 401056471. The reversal of 401056428 is 824650104.

It is a junction number, because it is equal to n+sod(n) for n = 401056395 and 401056404.

It is not an unprimeable number, because it can be changed into a prime (401056421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 712075 + ... + 712637.

It is an arithmetic number, because the mean of its divisors is an integer number (10659600).

Almost surely, 2^401056428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401056428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (511660800).

401056428 is an abundant number, since it is smaller than the sum of its proper divisors (622265172).

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

401056428 is a wasteful number, since it uses less digits than its factorization.

401056428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711 (or 709 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 401056428 is about 20026.3932848629. The cubic root of 401056428 is about 737.4543818571.

The spelling of 401056428 in words is "four hundred one million, fifty-six thousand, four hundred twenty-eight".