136785440 has 48 divisors (see below), whose sum is σ = 352537920. Its totient is φ = 49739520.

The previous prime is 136785437. The next prime is 136785443. The reversal of 136785440 is 44587631.

It is an interprime number because it is at equal distance from previous prime (136785437) and next prime (136785443).

It is a junction number, because it is equal to n+sod(n) for n = 136785394 and 136785403.

It is not an unprimeable number, because it can be changed into a prime (136785443) 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, 37100 + ... + 40619.

It is an arithmetic number, because the mean of its divisors is an integer number (7344540).

Almost surely, 2^136785440 is an apocalyptic number.

136785440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136785440 is an abundant number, since it is smaller than the sum of its proper divisors (215752480).

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

136785440 is a wasteful number, since it uses less digits than its factorization.

136785440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77745 (or 77737 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 136785440 is about 11695.5307703413. The cubic root of 136785440 is about 515.2444122176.

The spelling of 136785440 in words is "one hundred thirty-six million, seven hundred eighty-five thousand, four hundred forty".