134781840 has 160 divisors (see below), whose sum is σ = 484611840. Its totient is φ = 34366464.

The previous prime is 134781811. The next prime is 134781847. The reversal of 134781840 is 48187431.

134781840 is a `hidden beast` number, since 1 + 3 + 478 + 184 + 0 = 666.

It is a super-2 number, since 2×134781840² = 36332288787571200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 134781795 and 134781804.

It is not an unprimeable number, because it can be changed into a prime (134781847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48324 + ... + 51036.

It is an arithmetic number, because the mean of its divisors is an integer number (3028824).

Almost surely, 2^134781840 is an apocalyptic number.

134781840 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 134781840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242305920).

134781840 is an abundant number, since it is smaller than the sum of its proper divisors (349830000).

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

134781840 is a wasteful number, since it uses less digits than its factorization.

134781840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2758 (or 2746 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 134781840 is about 11609.5581311263. The cubic root of 134781840 is about 512.7163029053.

The spelling of 134781840 in words is "one hundred thirty-four million, seven hundred eighty-one thousand, eight hundred forty".