1712438820 has 120 divisors (see below), whose sum is σ = 5400804024. Its totient is φ = 454201344.

The previous prime is 1712438813. The next prime is 1712438831. The reversal of 1712438820 is 288342171.

It can be written as a sum of positive squares in 4 ways, for example, as 491774976 + 1220663844 = 22176^2 + 34938^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 309922 + ... + 315398.

Almost surely, 2^1712438820 is an apocalyptic number.

1712438820 is a gapful number since it is divisible by the number (10) 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 1712438820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2700402012).

1712438820 is an abundant number, since it is smaller than the sum of its proper divisors (3688365204).

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

1712438820 is a wasteful number, since it uses less digits than its factorization.

1712438820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5691 (or 5680 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 1712438820 is about 41381.6241827215. The cubic root of 1712438820 is about 1196.3870078236.

The spelling of 1712438820 in words is "one billion, seven hundred twelve million, four hundred thirty-eight thousand, eight hundred twenty".