78551748 has 72 divisors (see below), whose sum is σ = 223886880. Its totient is φ = 23799600.

The previous prime is 78551741. The next prime is 78551779. The reversal of 78551748 is 84715587.

It is a happy number.

It is a super-2 number, since 2×78551748² = 12340754227711008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78551741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10063 + ... + 16073.

It is an arithmetic number, because the mean of its divisors is an integer number (3109540).

Almost surely, 2^78551748 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 78551748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111943440).

78551748 is an abundant number, since it is smaller than the sum of its proper divisors (145335132).

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

78551748 is a wasteful number, since it uses less digits than its factorization.

78551748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6046 (or 6027 counting only the distinct ones).

The product of its digits is 313600, while the sum is 45.

The square root of 78551748 is about 8862.9424008057. The cubic root of 78551748 is about 428.2709510945.

The spelling of 78551748 in words is "seventy-eight million, five hundred fifty-one thousand, seven hundred forty-eight".