690559020 has 120 divisors (see below), whose sum is σ = 2241162000. Its totient is φ = 177787008.

The previous prime is 690559019. The next prime is 690559031. The reversal of 690559020 is 20955096.

690559020 is a `hidden beast` number, since 69 + 0 + 5 + 590 + 2 + 0 = 666.

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

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 39631 + ... + 54329.

It is an arithmetic number, because the mean of its divisors is an integer number (18676350).

Almost surely, 2^690559020 is an apocalyptic number.

690559020 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 690559020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1120581000).

690559020 is an abundant number, since it is smaller than the sum of its proper divisors (1550602980).

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

690559020 is a wasteful number, since it uses less digits than its factorization.

690559020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14749 (or 14738 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 690559020 is about 26278.4896826283. The cubic root of 690559020 is about 883.8941660595.

The spelling of 690559020 in words is "six hundred ninety million, five hundred fifty-nine thousand, twenty".