1401028608 has 144 divisors (see below), whose sum is σ = 4278173760. Its totient is φ = 399507456.

The previous prime is 1401028597. The next prime is 1401028609. The reversal of 1401028608 is 8068201041.

It is not an unprimeable number, because it can be changed into a prime (1401028609) 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, 2752258 + ... + 2752766.

It is an arithmetic number, because the mean of its divisors is an integer number (29709540).

Almost surely, 2^1401028608 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 1401028608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2139086880).

1401028608 is an abundant number, since it is smaller than the sum of its proper divisors (2877145152).

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

1401028608 is an frugal number, since it uses more digits than its factorization.

1401028608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 1401028608 is about 37430.3166964962. The cubic root of 1401028608 is about 1118.9628493905.

Adding to 1401028608 its reverse (8068201041), we get a palindrome (9469229649).

The spelling of 1401028608 in words is "one billion, four hundred one million, twenty-eight thousand, six hundred eight".