1078737680 has 20 divisors (see below), whose sum is σ = 2508065292. Its totient is φ = 431495040.

The previous prime is 1078737661. The next prime is 1078737731. The reversal of 1078737680 is 867378701.

It can be written as a sum of positive squares in 2 ways, for example, as 607326736 + 471410944 = 24644^2 + 21712^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6742031 + ... + 6742190.

Almost surely, 2^1078737680 is an apocalyptic number.

1078737680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1078737680 is an abundant number, since it is smaller than the sum of its proper divisors (1429327612).

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

1078737680 is a wasteful number, since it uses less digits than its factorization.

1078737680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13484234 (or 13484228 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 47.

The square root of 1078737680 is about 32844.1422478956. The cubic root of 1078737680 is about 1025.5856831245.

The spelling of 1078737680 in words is "one billion, seventy-eight million, seven hundred thirty-seven thousand, six hundred eighty".