801131440 has 40 divisors (see below), whose sum is σ = 1865036880. Its totient is φ = 320038656.

The previous prime is 801131413. The next prime is 801131449. The reversal of 801131440 is 44131108.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (801131449) 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, 60106 + ... + 72214.

It is an arithmetic number, because the mean of its divisors is an integer number (46625922).

Almost surely, 2^801131440 is an apocalyptic number.

801131440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

801131440 is an abundant number, since it is smaller than the sum of its proper divisors (1063905440).

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

801131440 is a wasteful number, since it uses less digits than its factorization.

801131440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12949 (or 12943 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 801131440 is about 28304.2654029388. The cubic root of 801131440 is about 928.7552005056.

Adding to 801131440 its reverse (44131108), we get a palindrome (845262548).

The spelling of 801131440 in words is "eight hundred one million, one hundred thirty-one thousand, four hundred forty".