1725727220 has 48 divisors (see below), whose sum is σ = 4275360768. Its totient is φ = 572590080.

The previous prime is 1725727217. The next prime is 1725727243. The reversal of 1725727220 is 227275271.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194477 + ... + 203156.

It is an arithmetic number, because the mean of its divisors is an integer number (89070016).

Almost surely, 2^1725727220 is an apocalyptic number.

1725727220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1725727220 is an abundant number, since it is smaller than the sum of its proper divisors (2549633548).

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

1725727220 is a wasteful number, since it uses less digits than its factorization.

1725727220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397680 (or 397678 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 35.

The square root of 1725727220 is about 41541.8730920983. The cubic root of 1725727220 is about 1199.4736626931.

The spelling of 1725727220 in words is "one billion, seven hundred twenty-five million, seven hundred twenty-seven thousand, two hundred twenty".