690405046 has 8 divisors (see below), whose sum is σ = 1036111464. Its totient is φ = 345034560.

The previous prime is 690405041. The next prime is 690405073. The reversal of 690405046 is 640504096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690405041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78780 + ... + 87103.

It is an arithmetic number, because the mean of its divisors is an integer number (129513933).

Almost surely, 2^690405046 is an apocalyptic number.

690405046 is a deficient number, since it is larger than the sum of its proper divisors (345706418).

690405046 is a wasteful number, since it uses less digits than its factorization.

690405046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167966.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 690405046 is about 26275.5598608288. The cubic root of 690405046 is about 883.8284671920.

It can be divided in two parts, 6904050 and 46, that added together give a palindrome (6904096).

The spelling of 690405046 in words is "six hundred ninety million, four hundred five thousand, forty-six".