1401331528 has 32 divisors (see below), whose sum is σ = 2673723960. Its totient is φ = 688366080.

The previous prime is 1401331523. The next prime is 1401331531. The reversal of 1401331528 is 8251331041.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 658332964 + 742998564 = 25658^2 + 27258^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1401331496 and 1401331505.

It is not an unprimeable number, because it can be changed into a prime (1401331523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 807750 + ... + 809482.

Almost surely, 2^1401331528 is an apocalyptic number.

It is an amenable number.

1401331528 is a deficient number, since it is larger than the sum of its proper divisors (1272392432).

1401331528 is a wasteful number, since it uses less digits than its factorization.

1401331528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3457 (or 3453 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1401331528 is about 37434.3629303345. The cubic root of 1401331528 is about 1119.0434881912.

Adding to 1401331528 its reverse (8251331041), we get a palindrome (9652662569).

It can be divided in two parts, 1401 and 331528, that added together give a square (332929 = 577²).

The spelling of 1401331528 in words is "one billion, four hundred one million, three hundred thirty-one thousand, five hundred twenty-eight".