690306928878 has 64 divisors (see below), whose sum is σ = 1671004781568. Its totient is φ = 185590310400.

The previous prime is 690306928853. The next prime is 690306928879. The reversal of 690306928878 is 878829603096.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690306928879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3437376 + ... + 3632652.

It is an arithmetic number, because the mean of its divisors is an integer number (26109449712).

Almost surely, 2^690306928878 is an apocalyptic number.

690306928878 is an abundant number, since it is smaller than the sum of its proper divisors (980697852690).

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

690306928878 is a wasteful number, since it uses less digits than its factorization.

690306928878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200257.

The product of its (nonzero) digits is 62705664, while the sum is 66.

The spelling of 690306928878 in words is "six hundred ninety billion, three hundred six million, nine hundred twenty-eight thousand, eight hundred seventy-eight".