690087426 has 32 divisors (see below), whose sum is σ = 1670129280. Its totient is φ = 185569536.

The previous prime is 690087403. The next prime is 690087427. The reversal of 690087426 is 624780096.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (690087427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 482541 + ... + 483968.

It is an arithmetic number, because the mean of its divisors is an integer number (52191540).

Almost surely, 2^690087426 is an apocalyptic number.

690087426 is an abundant number, since it is smaller than the sum of its proper divisors (980041854).

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

690087426 is a wasteful number, since it uses less digits than its factorization.

690087426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966538.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 690087426 is about 26269.5151458873. The cubic root of 690087426 is about 883.6929116661.

The spelling of 690087426 in words is "six hundred ninety million, eighty-seven thousand, four hundred twenty-six".