78097446 has 80 divisors (see below), whose sum is σ = 203454240. Its totient is φ = 21928320.

The previous prime is 78097441. The next prime is 78097447. The reversal of 78097446 is 64479087.

It is a super-2 number, since 2×78097446² = 12198422143445832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78097441) 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 39 ways as a sum of consecutive naturals, for example, 68610 + ... + 69738.

It is an arithmetic number, because the mean of its divisors is an integer number (2543178).

Almost surely, 2^78097446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78097446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101727120).

78097446 is an abundant number, since it is smaller than the sum of its proper divisors (125356794).

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

78097446 is a wasteful number, since it uses less digits than its factorization.

78097446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211 (or 1202 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 78097446 is about 8837.2759377537. The cubic root of 78097446 is about 427.4437229705.

The spelling of 78097446 in words is "seventy-eight million, ninety-seven thousand, four hundred forty-six".