690458850 has 192 divisors, whose sum is σ = 2042369280. Its totient is φ = 171072000.

The previous prime is 690458849. The next prime is 690458903. The reversal of 690458850 is 58854096.

690458850 is a `hidden beast` number, since 69 + 0 + 4 + 588 + 5 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 690458796 and 690458805.

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 95 ways as a sum of consecutive naturals, for example, 1148550 + ... + 1149150.

It is an arithmetic number, because the mean of its divisors is an integer number (10637340).

Almost surely, 2^690458850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690458850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1021184640).

690458850 is an abundant number, since it is smaller than the sum of its proper divisors (1351910430).

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

690458850 is a wasteful number, since it uses less digits than its factorization.

690458850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 690458850 is about 26276.5836820543. The cubic root of 690458850 is about 883.8514258266.

The spelling of 690458850 in words is "six hundred ninety million, four hundred fifty-eight thousand, eight hundred fifty".