690272064 has 112 divisors (see below), whose sum is σ = 2078979840. Its totient is φ = 224455680.

The previous prime is 690272047. The next prime is 690272069. The reversal of 690272064 is 460272096.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690272069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65977 + ... + 75719.

It is an arithmetic number, because the mean of its divisors is an integer number (18562320).

Almost surely, 2^690272064 is an apocalyptic number.

690272064 is a gapful number since it is divisible by the number (64) 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 690272064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1039489920).

690272064 is an abundant number, since it is smaller than the sum of its proper divisors (1388707776).

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

690272064 is a wasteful number, since it uses less digits than its factorization.

690272064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9805 (or 9789 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 690272064 is about 26273.0292124833. The cubic root of 690272064 is about 883.7717174985.

The spelling of 690272064 in words is "six hundred ninety million, two hundred seventy-two thousand, sixty-four".