78380146 has 8 divisors (see below), whose sum is σ = 126614124. Its totient is φ = 36175440.

The previous prime is 78380119. The next prime is 78380147. The reversal of 78380146 is 64108387.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 75012921 + 3367225 = 8661^2 + 1835^2 .

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

It is a super-2 number, since 2×78380146² = 12286894573962632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78380147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1507285 + ... + 1507336.

Almost surely, 2^78380146 is an apocalyptic number.

78380146 is a deficient number, since it is larger than the sum of its proper divisors (48233978).

78380146 is a wasteful number, since it uses less digits than its factorization.

78380146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3014636.

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

The square root of 78380146 is about 8853.2562371141. The cubic root of 78380146 is about 427.9588607211.

The spelling of 78380146 in words is "seventy-eight million, three hundred eighty thousand, one hundred forty-six".