690912768 has 160 divisors (see below), whose sum is σ = 2265854976. Its totient is φ = 182181888.

The previous prime is 690912763. The next prime is 690912829. The reversal of 690912768 is 867219096.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690912763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137305 + ... + 142247.

Almost surely, 2^690912768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690912768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1132927488).

690912768 is an abundant number, since it is smaller than the sum of its proper divisors (1574942208).

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

690912768 is a wasteful number, since it uses less digits than its factorization.

690912768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4984 (or 4968 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 690912768 is about 26285.2195729844. The cubic root of 690912768 is about 884.0450691244.

The spelling of 690912768 in words is "six hundred ninety million, nine hundred twelve thousand, seven hundred sixty-eight".