1725724890 has 48 divisors (see below), whose sum is σ = 4528843488. Its totient is φ = 455889888.

The previous prime is 1725724879. The next prime is 1725724907. The reversal of 1725724890 is 984275271.

It is a happy number.

1725724890 is a `hidden beast` number, since 1 + 72 + 572 + 4 + 8 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79972 + ... + 99231.

It is an arithmetic number, because the mean of its divisors is an integer number (94350906).

Almost surely, 2^1725724890 is an apocalyptic number.

1725724890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1725724890 is an abundant number, since it is smaller than the sum of its proper divisors (2803118598).

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

1725724890 is a wasteful number, since it uses less digits than its factorization.

1725724890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179323 (or 179320 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 1725724890 is about 41541.8450480958. The cubic root of 1725724890 is about 1199.4731228676.

It can be divided in two parts, 1725 and 724890, that added together give a triangular number (726615 = T₁₂₀₅).

The spelling of 1725724890 in words is "one billion, seven hundred twenty-five million, seven hundred twenty-four thousand, eight hundred ninety".