1117278540 has 144 divisors (see below), whose sum is σ = 3886978368. Its totient is φ = 254472192.

The previous prime is 1117278523. The next prime is 1117278541. The reversal of 1117278540 is 458727111.

It is a super-2 number, since 2×1117278540² = 2496622671889063200, 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 = 1117278495 and 1117278504.

It is not an unprimeable number, because it can be changed into a prime (1117278541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 392964 + ... + 395796.

Almost surely, 2^1117278540 is an apocalyptic number.

1117278540 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 1117278540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1943489184).

1117278540 is an abundant number, since it is smaller than the sum of its proper divisors (2769699828).

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

1117278540 is a wasteful number, since it uses less digits than its factorization.

1117278540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3168 (or 3163 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 36.

The square root of 1117278540 is about 33425.7167462420. The cubic root of 1117278540 is about 1037.6569973863.

The spelling of 1117278540 in words is "one billion, one hundred seventeen million, two hundred seventy-eight thousand, five hundred forty".