690298560 has 336 divisors, whose sum is σ = 2749271616. Its totient is φ = 155713536.

The previous prime is 690298547. The next prime is 690298561. The reversal of 690298560 is 65892096.

690298560 is a `hidden beast` number, since 69 + 0 + 29 + 8 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

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

It is not an unprimeable number, because it can be changed into a prime (690298561) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1955344 + ... + 1955696.

It is an arithmetic number, because the mean of its divisors is an integer number (8182356).

Almost surely, 2^690298560 is an apocalyptic number.

690298560 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 690298560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1374635808).

690298560 is an abundant number, since it is smaller than the sum of its proper divisors (2058973056).

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

690298560 is a wasteful number, since it uses less digits than its factorization.

690298560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 690298560 is about 26273.5334509845. The cubic root of 690298560 is about 883.7830251732.

The spelling of 690298560 in words is "six hundred ninety million, two hundred ninety-eight thousand, five hundred sixty".