670728240400 has 45 divisors (see below), whose sum is σ = 1611463950511. Its totient is φ = 268284744320.

The previous prime is 670728240383. The next prime is 670728240421. The reversal of 670728240400 is 4042827076.

The square root of 670728240400 is 818980.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 24157863184 + 646570377216 = 155428^2 + 804096^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 16359126 + ... + 16400074.

Almost surely, 2^670728240400 is an apocalyptic number.

670728240400 is the 818980-th square number.

It is an amenable number.

670728240400 is an abundant number, since it is smaller than the sum of its proper divisors (940735710111).

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

670728240400 is an frugal number, since it uses more digits than its factorization.

670728240400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81916 (or 40956 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 40.

The spelling of 670728240400 in words is "six hundred seventy billion, seven hundred twenty-eight million, two hundred forty thousand, four hundred".