78214450 has 96 divisors (see below), whose sum is σ = 168739200. Its totient is φ = 26772480.

The previous prime is 78214441. The next prime is 78214481. The reversal of 78214450 is 5441287.

It is a super-2 number, since 2×78214450² = 12235000377605000, which contains 22 as substring.

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, 468267 + ... + 468433.

It is an arithmetic number, because the mean of its divisors is an integer number (1757700).

Almost surely, 2^78214450 is an apocalyptic number.

78214450 is an abundant number, since it is smaller than the sum of its proper divisors (90524750).

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

78214450 is a wasteful number, since it uses less digits than its factorization.

78214450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 78214450 is about 8843.8933733961. The cubic root of 78214450 is about 427.6570789453.

The spelling of 78214450 in words is "seventy-eight million, two hundred fourteen thousand, four hundred fifty".