135439040 has 112 divisors (see below), whose sum is σ = 356067360. Its totient is φ = 48660480.

The previous prime is 135439039. The next prime is 135439067. The reversal of 135439040 is 40934531.

It is a super-2 number, since 2×135439040² = 36687467112243200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 135438994 and 135439012.

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, 383504 + ... + 383856.

Almost surely, 2^135439040 is an apocalyptic number.

135439040 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 135439040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178033680).

135439040 is an abundant number, since it is smaller than the sum of its proper divisors (220628320).

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

135439040 is a wasteful number, since it uses less digits than its factorization.

135439040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 135439040 is about 11637.8279760443. The cubic root of 135439040 is about 513.5482917505.

The spelling of 135439040 in words is "one hundred thirty-five million, four hundred thirty-nine thousand, forty".