1081954840 has 16 divisors (see below), whose sum is σ = 2434398480. Its totient is φ = 432781920.

The previous prime is 1081954771. The next prime is 1081954843. The reversal of 1081954840 is 484591801.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 27048871 = 1081954840 / (1 + 0 + 8 + 1 + 9 + 5 + 4 + 8 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 1081954793 and 1081954802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081954843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13524396 + ... + 13524475.

It is an arithmetic number, because the mean of its divisors is an integer number (152149905).

Almost surely, 2^1081954840 is an apocalyptic number.

1081954840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1081954840 is an abundant number, since it is smaller than the sum of its proper divisors (1352443640).

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

1081954840 is a wasteful number, since it uses less digits than its factorization.

1081954840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27048882 (or 27048878 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 1081954840 is about 32893.0819474248. The cubic root of 1081954840 is about 1026.6042188549.

The spelling of 1081954840 in words is "one billion, eighty-one million, nine hundred fifty-four thousand, eight hundred forty".