690464880 has 180 divisors, whose sum is σ = 2697530472. Its totient is φ = 157812480.

The previous prime is 690464849. The next prime is 690464893. The reversal of 690464880 is 88464096.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (180).

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

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 25495 + ... + 45065.

Almost surely, 2^690464880 is an apocalyptic number.

690464880 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 690464880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1348765236).

690464880 is an abundant number, since it is smaller than the sum of its proper divisors (2007065592).

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

690464880 is a wasteful number, since it uses less digits than its factorization.

690464880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19604 (or 19588 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 690464880 is about 26276.6984227471. The cubic root of 690464880 is about 883.8539988057.

The spelling of 690464880 in words is "six hundred ninety million, four hundred sixty-four thousand, eight hundred eighty".