78106450 has 12 divisors (see below), whose sum is σ = 145278090. Its totient is φ = 31242560.

The previous prime is 78106421. The next prime is 78106451. The reversal of 78106450 is 5460187.

It can be written as a sum of positive squares in 3 ways, for example, as 69338929 + 8767521 = 8327^2 + 2961^2 .

It is a super-2 number, since 2×78106450² = 12201235063205000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78106451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 781015 + ... + 781114.

Almost surely, 2^78106450 is an apocalyptic number.

78106450 is a deficient number, since it is larger than the sum of its proper divisors (67171640).

78106450 is a wasteful number, since it uses less digits than its factorization.

78106450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562141 (or 1562136 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 78106450 is about 8837.7853560720. The cubic root of 78106450 is about 427.4601492669.

The spelling of 78106450 in words is "seventy-eight million, one hundred six thousand, four hundred fifty".