721286160 has 160 divisors (see below), whose sum is σ = 2591834112. Its totient is φ = 162516480.

The previous prime is 721286129. The next prime is 721286161. The reversal of 721286160 is 61682127.

It is not an unprimeable number, because it can be changed into a prime (721286161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116257 + ... + 122303.

Almost surely, 2^721286160 is an apocalyptic number.

721286160 is a gapful number since it is divisible by the number (70) 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 721286160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1295917056).

721286160 is an abundant number, since it is smaller than the sum of its proper divisors (1870547952).

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

721286160 is a wasteful number, since it uses less digits than its factorization.

721286160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6141 (or 6135 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 721286160 is about 26856.7712132341. The cubic root of 721286160 is about 896.8143173583.

The spelling of 721286160 in words is "seven hundred twenty-one million, two hundred eighty-six thousand, one hundred sixty".