690263856 has 280 divisors, whose sum is σ = 2185860096. Its totient is φ = 210418560.

The previous prime is 690263839. The next prime is 690263881. The reversal of 690263856 is 658362096.

It is a happy number.

690263856 is a `hidden beast` number, since 6 + 9 + 0 + 2 + 638 + 5 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 8316391 + ... + 8316473.

Almost surely, 2^690263856 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 690263856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1092930048).

690263856 is an abundant number, since it is smaller than the sum of its proper divisors (1495596240).

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

690263856 is a wasteful number, since it uses less digits than its factorization.

690263856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 690263856 is about 26272.8730062017. The cubic root of 690263856 is about 883.7682145188.

The spelling of 690263856 in words is "six hundred ninety million, two hundred sixty-three thousand, eight hundred fifty-six".