690318720 has 512 divisors, whose sum is σ = 3015936000. Its totient is φ = 145317888.

The previous prime is 690318679. The next prime is 690318721. The reversal of 690318720 is 27813096.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690318721) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1572261 + ... + 1572699.

It is an arithmetic number, because the mean of its divisors is an integer number (5890500).

Almost surely, 2^690318720 is an apocalyptic number.

690318720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690318720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1507968000).

690318720 is an abundant number, since it is smaller than the sum of its proper divisors (2325617280).

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

690318720 is a wasteful number, since it uses less digits than its factorization.

690318720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 690318720 is about 26273.9171042310. The cubic root of 690318720 is about 883.7916286448.

The spelling of 690318720 in words is "six hundred ninety million, three hundred eighteen thousand, seven hundred twenty".