698881278 has 16 divisors (see below), whose sum is σ = 1400547456. Its totient is φ = 232496280.

The previous prime is 698881277. The next prime is 698881283. The reversal of 698881278 is 872188896.

698881278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698881273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112768 + ... + 118803.

It is an arithmetic number, because the mean of its divisors is an integer number (87534216).

Almost surely, 2^698881278 is an apocalyptic number.

698881278 is an abundant number, since it is smaller than the sum of its proper divisors (701666178).

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

698881278 is a wasteful number, since it uses less digits than its factorization.

698881278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232079.

The product of its digits is 3096576, while the sum is 57.

The square root of 698881278 is about 26436.3627982368. The cubic root of 698881278 is about 887.4307410874.

The spelling of 698881278 in words is "six hundred ninety-eight million, eight hundred eighty-one thousand, two hundred seventy-eight".