1401020128 has 48 divisors (see below), whose sum is σ = 2802401280. Its totient is φ = 689360256.

The previous prime is 1401020053. The next prime is 1401020147. The reversal of 1401020128 is 8210201041.

It is a happy number.

It is a super-2 number, since 2×1401020128² = 3925714798122272768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 967501 + ... + 968947.

It is an arithmetic number, because the mean of its divisors is an integer number (58383360).

Almost surely, 2^1401020128 is an apocalyptic number.

It is an amenable number.

1401020128 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

1401020128 is a wasteful number, since it uses less digits than its factorization.

1401020128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919 (or 1911 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 1401020128 is about 37430.2034191640. The cubic root of 1401020128 is about 1118.9605918053.

Adding to 1401020128 its reverse (8210201041), we get a palindrome (9611221169).

The spelling of 1401020128 in words is "one billion, four hundred one million, twenty thousand, one hundred twenty-eight".