690239026854 has 64 divisors (see below), whose sum is σ = 1652441918400. Its totient is φ = 212305660416.

The previous prime is 690239026847. The next prime is 690239026861. The reversal of 690239026854 is 458620932096.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (690239026847) and next prime (690239026861).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 690239026854.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1815232 + ... + 2162300.

It is an arithmetic number, because the mean of its divisors is an integer number (25819404975).

Almost surely, 2^690239026854 is an apocalyptic number.

690239026854 is an abundant number, since it is smaller than the sum of its proper divisors (962202891546).

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

690239026854 is a wasteful number, since it uses less digits than its factorization.

690239026854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349926 (or 349920 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 690239026854 in words is "six hundred ninety billion, two hundred thirty-nine million, twenty-six thousand, eight hundred fifty-four".