78332478 has 96 divisors (see below), whose sum is σ = 197539200. Its totient is φ = 20575296.

The previous prime is 78332461. The next prime is 78332483. The reversal of 78332478 is 87423387.

It is a super-2 number, since 2×78332478² = 12271954219240968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 206493 + ... + 206871.

It is an arithmetic number, because the mean of its divisors is an integer number (2057700).

Almost surely, 2^78332478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78332478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98769600).

78332478 is an abundant number, since it is smaller than the sum of its proper divisors (119206722).

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

78332478 is a wasteful number, since it uses less digits than its factorization.

78332478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 447 counting only the distinct ones).

The product of its digits is 225792, while the sum is 42.

The square root of 78332478 is about 8850.5637108605. The cubic root of 78332478 is about 427.8720867061.

Subtracting 78332478 from its reverse (87423387), we obtain a palindrome (9090909).

The spelling of 78332478 in words is "seventy-eight million, three hundred thirty-two thousand, four hundred seventy-eight".