690807120 has 80 divisors (see below), whose sum is σ = 2161230720. Its totient is φ = 182518272.

The previous prime is 690807119. The next prime is 690807133. The reversal of 690807120 is 21708096.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12957 + ... + 39363.

It is an arithmetic number, because the mean of its divisors is an integer number (27015384).

Almost surely, 2^690807120 is an apocalyptic number.

690807120 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 690807120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080615360).

690807120 is an abundant number, since it is smaller than the sum of its proper divisors (1470423600).

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

690807120 is a wasteful number, since it uses less digits than its factorization.

690807120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26532 (or 26526 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 690807120 is about 26283.2098496359. The cubic root of 690807120 is about 884.0000068249. Note that the first 5 decimals are identical.

The spelling of 690807120 in words is "six hundred ninety million, eight hundred seven thousand, one hundred twenty".