801531720 has 512 divisors, whose sum is σ = 3172608000. Its totient is φ = 177914880.

The previous prime is 801531659. The next prime is 801531767. The reversal of 801531720 is 27135108.

It is a super-3 number, since 3×801531720³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 11963127 + ... + 11963193.

It is an arithmetic number, because the mean of its divisors is an integer number (6196500).

Almost surely, 2^801531720 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 801531720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1586304000).

801531720 is an abundant number, since it is smaller than the sum of its proper divisors (2371076280).

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

801531720 is a wasteful number, since it uses less digits than its factorization.

801531720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 801531720 is about 28311.3355389674. The cubic root of 801531720 is about 928.9098568721.

Adding to 801531720 its reverse (27135108), we get a palindrome (828666828).

The spelling of 801531720 in words is "eight hundred one million, five hundred thirty-one thousand, seven hundred twenty".