1401981280 has 96 divisors (see below), whose sum is σ = 3813397056. Its totient is φ = 477118464.

The previous prime is 1401981247. The next prime is 1401981341. The reversal of 1401981280 is 821891041.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148872 + ... + 158008.

It is an arithmetic number, because the mean of its divisors is an integer number (39722886).

Almost surely, 2^1401981280 is an apocalyptic number.

1401981280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1401981280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1906698528).

1401981280 is an abundant number, since it is smaller than the sum of its proper divisors (2411415776).

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

1401981280 is a wasteful number, since it uses less digits than its factorization.

1401981280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9296 (or 9288 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 1401981280 is about 37443.0404748332. The cubic root of 1401981280 is about 1119.2164161961.

The spelling of 1401981280 in words is "one billion, four hundred one million, nine hundred eighty-one thousand, two hundred eighty".