78161446 has 8 divisors (see below), whose sum is σ = 127900584. Its totient is φ = 35527920.

The previous prime is 78161443. The next prime is 78161449. The reversal of 78161446 is 64416187.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78161443) and next prime (78161449).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78161446² = 12218423281621832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78161441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1776375 + ... + 1776418.

It is an arithmetic number, because the mean of its divisors is an integer number (15987573).

Almost surely, 2^78161446 is an apocalyptic number.

78161446 is a deficient number, since it is larger than the sum of its proper divisors (49739138).

78161446 is a wasteful number, since it uses less digits than its factorization.

78161446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3552806.

The product of its digits is 32256, while the sum is 37.

The square root of 78161446 is about 8840.8962215377. The cubic root of 78161446 is about 427.5604529035.

The spelling of 78161446 in words is "seventy-eight million, one hundred sixty-one thousand, four hundred forty-six".