135697940 has 24 divisors (see below), whose sum is σ = 325675392. Its totient is φ = 46524960.

The previous prime is 135697937. The next prime is 135697949. The reversal of 135697940 is 49796531.

It is a junction number, because it is equal to n+sod(n) for n = 135697891 and 135697900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135697949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484496 + ... + 484775.

It is an arithmetic number, because the mean of its divisors is an integer number (13569808).

Almost surely, 2^135697940 is an apocalyptic number.

135697940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135697940 is an abundant number, since it is smaller than the sum of its proper divisors (189977452).

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

135697940 is a wasteful number, since it uses less digits than its factorization.

135697940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969287 (or 969285 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 135697940 is about 11648.9458750567. The cubic root of 135697940 is about 513.8753097794.

The spelling of 135697940 in words is "one hundred thirty-five million, six hundred ninety-seven thousand, nine hundred forty".