136997440 has 56 divisors (see below), whose sum is σ = 328891392. Its totient is φ = 54351360.

The previous prime is 136997437. The next prime is 136997459. The reversal of 136997440 is 44799631.

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, 38955 + ... + 42325.

Almost surely, 2^136997440 is an apocalyptic number.

136997440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136997440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164445696).

136997440 is an abundant number, since it is smaller than the sum of its proper divisors (191893952).

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

136997440 is a wasteful number, since it uses less digits than its factorization.

136997440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3515 (or 3505 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 136997440 is about 11704.5905524286. The cubic root of 136997440 is about 515.5104625422.

The spelling of 136997440 in words is "one hundred thirty-six million, nine hundred ninety-seven thousand, four hundred forty".