720687375 has 160 divisors (see below), whose sum is σ = 1467797760. Its totient is φ = 350438400.

The previous prime is 720687371. The next prime is 720687377. The reversal of 720687375 is 573786027.

It is not a de Polignac number, because 720687375 - 2² = 720687371 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 720687375.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720687371) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 9122586 + ... + 9122664.

It is an arithmetic number, because the mean of its divisors is an integer number (9173736).

Almost surely, 2^720687375 is an apocalyptic number.

720687375 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

720687375 is an abundant number, since it is smaller than the sum of its proper divisors (747110385).

720687375 is a wasteful number, since it uses less digits than its factorization.

720687375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 45.

The square root of 720687375 is about 26845.6211513163. The cubic root of 720687375 is about 896.5660813329.

The spelling of 720687375 in words is "seven hundred twenty million, six hundred eighty-seven thousand, three hundred seventy-five".