698571378 has 120 divisors (see below), whose sum is σ = 1706384592. Its totient is φ = 213446016.

The previous prime is 698571373. The next prime is 698571431. The reversal of 698571378 is 873175896.

698571378 is a `hidden beast` number, since 69 + 8 + 571 + 3 + 7 + 8 = 666.

698571378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (698571371) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2013001 + ... + 2013347.

Almost surely, 2^698571378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 698571378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (853192296).

698571378 is an abundant number, since it is smaller than the sum of its proper divisors (1007813214).

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

698571378 is a wasteful number, since it uses less digits than its factorization.

698571378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 412 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 698571378 is about 26430.5009033124. The cubic root of 698571378 is about 887.2995526416.

The spelling of 698571378 in words is "six hundred ninety-eight million, five hundred seventy-one thousand, three hundred seventy-eight".