1720780532 has 12 divisors (see below), whose sum is σ = 3011820000. Its totient is φ = 860260536.

The previous prime is 1720780517. The next prime is 1720780541. The reversal of 1720780532 is 2350870271.

It is a super-2 number, since 2×1720780532² = 5922171278620406048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1720780492 and 1720780501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1313 + ... + 58679.

It is an arithmetic number, because the mean of its divisors is an integer number (250985000).

Almost surely, 2^1720780532 is an apocalyptic number.

It is an amenable number.

1720780532 is a deficient number, since it is larger than the sum of its proper divisors (1291039468).

1720780532 is a wasteful number, since it uses less digits than its factorization.

1720780532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64870 (or 64868 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 1720780532 is about 41482.2917881835. The cubic root of 1720780532 is about 1198.3264940851.

The spelling of 1720780532 in words is "one billion, seven hundred twenty million, seven hundred eighty thousand, five hundred thirty-two".