698415138 has 12 divisors (see below), whose sum is σ = 1513232838. Its totient is φ = 232805040.

The previous prime is 698415127. The next prime is 698415139. The reversal of 698415138 is 831514896.

698415138 is a `hidden beast` number, since 6 + 98 + 41 + 513 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 351450009 + 346965129 = 18747^2 + 18627^2 .

It is a junction number, because it is equal to n+sod(n) for n = 698415093 and 698415102.

It is not an unprimeable number, because it can be changed into a prime (698415139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19400403 + ... + 19400438.

Almost surely, 2^698415138 is an apocalyptic number.

698415138 is an abundant number, since it is smaller than the sum of its proper divisors (814817700).

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

698415138 is a wasteful number, since it uses less digits than its factorization.

698415138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38800849 (or 38800846 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 698415138 is about 26427.5450619236. The cubic root of 698415138 is about 887.2333976177.

It can be divided in two parts, 6984 and 15138, that added together give a palindrome (22122).

The spelling of 698415138 in words is "six hundred ninety-eight million, four hundred fifteen thousand, one hundred thirty-eight".