694242090 has 80 divisors (see below), whose sum is σ = 1976587272. Its totient is φ = 174237696.

The previous prime is 694242089. The next prime is 694242119. The reversal of 694242090 is 90242496.

It can be written as a sum of positive squares in 4 ways, for example, as 586559961 + 107682129 = 24219^2 + 10377^2 .

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 39 ways as a sum of consecutive naturals, for example, 11439 + ... + 38978.

Almost surely, 2^694242090 is an apocalyptic number.

694242090 is an abundant number, since it is smaller than the sum of its proper divisors (1282345182).

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

694242090 is a wasteful number, since it uses less digits than its factorization.

694242090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50453 (or 50444 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 694242090 is about 26348.4741493696. The cubic root of 694242090 is about 885.4627858226.

The spelling of 694242090 in words is "six hundred ninety-four million, two hundred forty-two thousand, ninety".