690546240 has 168 divisors, whose sum is σ = 2391387648. Its totient is φ = 182891520.

The previous prime is 690546229. The next prime is 690546247. The reversal of 690546240 is 42645096.

690546240 is a `hidden beast` number, since 6 + 90 + 546 + 24 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 690546195 and 690546204.

It is not an unprimeable number, because it can be changed into a prime (690546247) 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 23 ways as a sum of consecutive naturals, for example, 468705 + ... + 470175.

Almost surely, 2^690546240 is an apocalyptic number.

690546240 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 690546240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1195693824).

690546240 is an abundant number, since it is smaller than the sum of its proper divisors (1700841408).

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

690546240 is a wasteful number, since it uses less digits than its factorization.

690546240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657 (or 1644 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 690546240 is about 26278.2465168435. The cubic root of 690546240 is about 883.8887133578. Note that the first 3 decimals are identical.

The spelling of 690546240 in words is "six hundred ninety million, five hundred forty-six thousand, two hundred forty".