690446636 has 48 divisors (see below), whose sum is σ = 1399628160. Its totient is φ = 294539520.

The previous prime is 690446623. The next prime is 690446639. The reversal of 690446636 is 636644096.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (690446639) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 312311 + ... + 314513.

It is an arithmetic number, because the mean of its divisors is an integer number (29158920).

Almost surely, 2^690446636 is an apocalyptic number.

It is an amenable number.

690446636 is an abundant number, since it is smaller than the sum of its proper divisors (709181524).

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

690446636 is a wasteful number, since it uses less digits than its factorization.

690446636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654 (or 2652 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 44.

The square root of 690446636 is about 26276.3512687740. The cubic root of 690446636 is about 883.8462141113.

The spelling of 690446636 in words is "six hundred ninety million, four hundred forty-six thousand, six hundred thirty-six".