1401806928 has 80 divisors (see below), whose sum is σ = 3849198080. Its totient is φ = 438348672.

The previous prime is 1401806881. The next prime is 1401806929. The reversal of 1401806928 is 8296081041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401806929) 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 15 ways as a sum of consecutive naturals, for example, 86475 + ... + 101397.

It is an arithmetic number, because the mean of its divisors is an integer number (48114976).

Almost surely, 2^1401806928 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 1401806928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1924599040).

1401806928 is an abundant number, since it is smaller than the sum of its proper divisors (2447391152).

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

1401806928 is a wasteful number, since it uses less digits than its factorization.

1401806928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15056 (or 15050 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 1401806928 is about 37440.7121727138. The cubic root of 1401806928 is about 1119.1700185936.

Adding to 1401806928 its reverse (8296081041), we get a palindrome (9697887969).

The spelling of 1401806928 in words is "one billion, four hundred one million, eight hundred six thousand, nine hundred twenty-eight".