690842880 has 432 divisors, whose sum is σ = 2946303360. Its totient is φ = 145539072.

The previous prime is 690842857. The next prime is 690842891. The reversal of 690842880 is 88248096.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1047991 + ... + 1048649.

Almost surely, 2^690842880 is an apocalyptic number.

690842880 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 690842880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473151680).

690842880 is an abundant number, since it is smaller than the sum of its proper divisors (2255460480).

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

690842880 is a wasteful number, since it uses less digits than its factorization.

690842880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 690842880 is about 26283.8901230392. The cubic root of 690842880 is about 884.0152601394.

The spelling of 690842880 in words is "six hundred ninety million, eight hundred forty-two thousand, eight hundred eighty".