136597440 has 112 divisors (see below), whose sum is σ = 495677952. Its totient is φ = 31220736.

The previous prime is 136597429. The next prime is 136597457. The reversal of 136597440 is 44795631.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×136597440² = 37317721229107200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3444 + ... + 16883.

It is an arithmetic number, because the mean of its divisors is an integer number (4425696).

Almost surely, 2^136597440 is an apocalyptic number.

136597440 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 136597440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247838976).

136597440 is an abundant number, since it is smaller than the sum of its proper divisors (359080512).

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

136597440 is a wasteful number, since it uses less digits than its factorization.

136597440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20354 (or 20344 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 136597440 is about 11687.4907486594. The cubic root of 136597440 is about 515.0082507240.

The spelling of 136597440 in words is "one hundred thirty-six million, five hundred ninety-seven thousand, four hundred forty".