78748540 has 72 divisors (see below), whose sum is σ = 188183520. Its totient is φ = 27513216.

The previous prime is 78748529. The next prime is 78748567. The reversal of 78748540 is 4584787.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93441 + ... + 94279.

It is an arithmetic number, because the mean of its divisors is an integer number (2613660).

Almost surely, 2^78748540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78748540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94091760).

78748540 is an abundant number, since it is smaller than the sum of its proper divisors (109434980).

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

78748540 is a wasteful number, since it uses less digits than its factorization.

78748540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899 (or 878 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 43.

The square root of 78748540 is about 8874.0374125874. The cubic root of 78748540 is about 428.6282952054.

The spelling of 78748540 in words is "seventy-eight million, seven hundred forty-eight thousand, five hundred forty".