690079770 has 64 divisors (see below), whose sum is σ = 1843632000. Its totient is φ = 183679488.

The previous prime is 690079751. The next prime is 690079783. The reversal of 690079770 is 77970096.

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

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 31 ways as a sum of consecutive naturals, for example, 165066 + ... + 169194.

It is an arithmetic number, because the mean of its divisors is an integer number (28806750).

Almost surely, 2^690079770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690079770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (921816000).

690079770 is an abundant number, since it is smaller than the sum of its proper divisors (1153552230).

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

690079770 is a wasteful number, since it uses less digits than its factorization.

690079770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4764 (or 4758 counting only the distinct ones).

The product of its (nonzero) digits is 166698, while the sum is 45.

The square root of 690079770 is about 26269.3694252451. The cubic root of 690079770 is about 883.6896436850.

The spelling of 690079770 in words is "six hundred ninety million, seventy-nine thousand, seven hundred seventy".