1720893540 has 48 divisors (see below), whose sum is σ = 4930567488. Its totient is φ = 448232064.

The previous prime is 1720893539. The next prime is 1720893541. The reversal of 1720893540 is 453980271.

It is an interprime number because it is at equal distance from previous prime (1720893539) and next prime (1720893541).

It is a super-2 number, since 2×1720893540² = 5922949152027463200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1720893541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330927 + ... + 336086.

It is an arithmetic number, because the mean of its divisors is an integer number (102720156).

Almost surely, 2^1720893540 is an apocalyptic number.

1720893540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1720893540 is an abundant number, since it is smaller than the sum of its proper divisors (3209673948).

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

1720893540 is a wasteful number, since it uses less digits than its factorization.

1720893540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667068 (or 667066 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 1720893540 is about 41483.6538892128. The cubic root of 1720893540 is about 1198.3527258858.

The spelling of 1720893540 in words is "one billion, seven hundred twenty million, eight hundred ninety-three thousand, five hundred forty".