688361572 has 24 divisors (see below), whose sum is σ = 1297562112. Its totient is φ = 318595200.

The previous prime is 688361519. The next prime is 688361573. The reversal of 688361572 is 275163886.

It is a super-2 number, since 2×688361572² = 947683307612622368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (688361573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117829 + ... + 123532.

It is an arithmetic number, because the mean of its divisors is an integer number (54065088).

Almost surely, 2^688361572 is an apocalyptic number.

688361572 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

688361572 is a deficient number, since it is larger than the sum of its proper divisors (609200540).

688361572 is a wasteful number, since it uses less digits than its factorization.

688361572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241419 (or 241417 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 688361572 is about 26236.6455935205. The cubic root of 688361572 is about 882.9556146880.

The spelling of 688361572 in words is "six hundred eighty-eight million, three hundred sixty-one thousand, five hundred seventy-two".