137218240 has 28 divisors (see below), whose sum is σ = 326751696. Its totient is φ = 54887168.

The previous prime is 137218231. The next prime is 137218243. The reversal of 137218240 is 42812731.

It is a junction number, because it is equal to n+sod(n) for n = 137218199 and 137218208.

It is not an unprimeable number, because it can be changed into a prime (137218243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214084 + ... + 214723.

Almost surely, 2^137218240 is an apocalyptic number.

137218240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

137218240 is an abundant number, since it is smaller than the sum of its proper divisors (189533456).

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

137218240 is an equidigital number, since it uses as much as digits as its factorization.

137218240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428824 (or 428814 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 137218240 is about 11714.0189516664. The cubic root of 137218240 is about 515.7872648290.

The spelling of 137218240 in words is "one hundred thirty-seven million, two hundred eighteen thousand, two hundred forty".