1720474900 has 36 divisors (see below), whose sum is σ = 3748974460. Its totient is φ = 685324800.

The previous prime is 1720474897. The next prime is 1720474901. The reversal of 1720474900 is 94740271.

It can be written as a sum of positive squares in 6 ways, for example, as 197290116 + 1523184784 = 14046^2 + 39028^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720474901) 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, 11595 + ... + 59794.

Almost surely, 2^1720474900 is an apocalyptic number.

1720474900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1720474900 is an abundant number, since it is smaller than the sum of its proper divisors (2028499560).

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

1720474900 is a wasteful number, since it uses less digits than its factorization.

1720474900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71644 (or 71637 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 1720474900 is about 41478.6077394119. The cubic root of 1720474900 is about 1198.2555439936.

The spelling of 1720474900 in words is "one billion, seven hundred twenty million, four hundred seventy-four thousand, nine hundred".