1401531428 has 24 divisors (see below), whose sum is σ = 2816476320. Its totient is φ = 603529920.

The previous prime is 1401531407. The next prime is 1401531431. The reversal of 1401531428 is 8241351041.

It is a self number, because there is not a number n which added to its sum of digits gives 1401531428.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 837401 + ... + 839072.

It is an arithmetic number, because the mean of its divisors is an integer number (117353180).

Almost surely, 2^1401531428 is an apocalyptic number.

It is an amenable number.

1401531428 is an abundant number, since it is smaller than the sum of its proper divisors (1414944892).

1401531428 is a wasteful number, since it uses less digits than its factorization.

1401531428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676507 (or 1676505 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 1401531428 is about 37437.0328418266. The cubic root of 1401531428 is about 1119.0966961945.

Adding to 1401531428 its reverse (8241351041), we get a palindrome (9642882469).

The spelling of 1401531428 in words is "one billion, four hundred one million, five hundred thirty-one thousand, four hundred twenty-eight".