1081578078 has 144 divisors (see below), whose sum is σ = 2892211920. Its totient is φ = 290449152.

The previous prime is 1081578077. The next prime is 1081578089. The reversal of 1081578078 is 8708751801.

1081578078 is a `hidden beast` number, since 1 + 0 + 8 + 1 + 578 + 0 + 78 = 666.

It is a super-2 number, since 2×1081578078² = 2339622277620348168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081578077) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3904476 + ... + 3904752.

It is an arithmetic number, because the mean of its divisors is an integer number (20084805).

Almost surely, 2^1081578078 is an apocalyptic number.

1081578078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1081578078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1446105960).

1081578078 is an abundant number, since it is smaller than the sum of its proper divisors (1810633842).

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

1081578078 is a wasteful number, since it uses less digits than its factorization.

1081578078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 45.

The square root of 1081578078 is about 32887.3543782409. The cubic root of 1081578078 is about 1026.4850424811.

The spelling of 1081578078 in words is "one billion, eighty-one million, five hundred seventy-eight thousand, seventy-eight".