405247000720 has 60 divisors (see below), whose sum is σ = 943735767804. Its totient is φ = 161834886400.

The previous prime is 405247000663. The next prime is 405247000727. The reversal of 405247000720 is 27000742504.

It can be written as a sum of positive squares in 2 ways, for example, as 321230499984 + 84016500736 = 566772^2 + 289856^2 .

It is not an unprimeable number, because it can be changed into a prime (405247000727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33482670 + ... + 33494770.

Almost surely, 2^405247000720 is an apocalyptic number.

405247000720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

405247000720 is an abundant number, since it is smaller than the sum of its proper divisors (538488767084).

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

405247000720 is an equidigital number, since it uses as much as digits as its factorization.

405247000720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13408 (or 12755 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 31.

The spelling of 405247000720 in words is "four hundred five billion, two hundred forty-seven million, seven hundred twenty", and thus it is an aban number.