1401453636 has 96 divisors (see below), whose sum is σ = 3684925440. Its totient is φ = 410860800.

The previous prime is 1401453631. The next prime is 1401453637. The reversal of 1401453636 is 6363541041.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 1401453597 and 1401453606.

It is not an unprimeable number, because it can be changed into a prime (1401453631) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 686305 + ... + 688343.

It is an arithmetic number, because the mean of its divisors is an integer number (38384640).

Almost surely, 2^1401453636 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 1401453636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1842462720).

1401453636 is an abundant number, since it is smaller than the sum of its proper divisors (2283471804).

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

1401453636 is a wasteful number, since it uses less digits than its factorization.

1401453636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225 (or 2223 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 1401453636 is about 37435.9938561807. The cubic root of 1401453636 is about 1119.0759906578.

Adding to 1401453636 its reverse (6363541041), we get a palindrome (7764994677).

The spelling of 1401453636 in words is "one billion, four hundred one million, four hundred fifty-three thousand, six hundred thirty-six".