78811488 has 192 divisors, whose sum is σ = 267563520. Its totient is φ = 22104576.

The previous prime is 78811463. The next prime is 78811493. The reversal of 78811488 is 88411887.

It is a super-2 number, since 2×78811488² = 12422501281548288, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 501906 + ... + 502062.

It is an arithmetic number, because the mean of its divisors is an integer number (1393560).

Almost surely, 2^78811488 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 78811488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133781760).

78811488 is an abundant number, since it is smaller than the sum of its proper divisors (188752032).

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

78811488 is a wasteful number, since it uses less digits than its factorization.

78811488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 252 counting only the distinct ones).

The product of its digits is 114688, while the sum is 45.

The square root of 78811488 is about 8877.5834549724. The cubic root of 78811488 is about 428.7424734404.

The spelling of 78811488 in words is "seventy-eight million, eight hundred eleven thousand, four hundred eighty-eight".