698133840 has 40 divisors (see below), whose sum is σ = 2164215648. Its totient is φ = 186168960.

The previous prime is 698133829. The next prime is 698133893. The reversal of 698133840 is 48331896.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 698133792 and 698133801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1454206 + ... + 1454685.

Almost surely, 2^698133840 is an apocalyptic number.

698133840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

698133840 is an abundant number, since it is smaller than the sum of its proper divisors (1466081808).

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

698133840 is a wasteful number, since it uses less digits than its factorization.

698133840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908907 (or 2908901 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 698133840 is about 26422.2224651902. Note that the first 3 decimals coincide. The cubic root of 698133840 is about 887.1142657522.

The spelling of 698133840 in words is "six hundred ninety-eight million, one hundred thirty-three thousand, eight hundred forty".