698408634 has 64 divisors (see below), whose sum is σ = 1744883712. Its totient is φ = 181051200.

The previous prime is 698408617. The next prime is 698408647. The reversal of 698408634 is 436804896.

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, 304239 + ... + 306525.

It is an arithmetic number, because the mean of its divisors is an integer number (27263808).

Almost surely, 2^698408634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 698408634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (872441856).

698408634 is an abundant number, since it is smaller than the sum of its proper divisors (1046475078).

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

698408634 is a wasteful number, since it uses less digits than its factorization.

698408634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2971.

The product of its (nonzero) digits is 995328, while the sum is 48.

The square root of 698408634 is about 26427.4220082096. The cubic root of 698408634 is about 887.2306434850.

The spelling of 698408634 in words is "six hundred ninety-eight million, four hundred eight thousand, six hundred thirty-four".