78067400 has 48 divisors (see below), whose sum is σ = 192191940. Its totient is φ = 29388800.

The previous prime is 78067399. The next prime is 78067421. The reversal of 78067400 is 476087.

It can be written as a sum of positive squares in 6 ways, for example, as 47087044 + 30980356 = 6862^2 + 5566^2 .

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 11 ways as a sum of consecutive naturals, for example, 8081 + ... + 14880.

Almost surely, 2^78067400 is an apocalyptic number.

It is an amenable number.

78067400 is an abundant number, since it is smaller than the sum of its proper divisors (114124540).

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

78067400 is a wasteful number, since it uses less digits than its factorization.

78067400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22994 (or 22985 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 78067400 is about 8835.5758159839. The cubic root of 78067400 is about 427.3888999167.

The spelling of 78067400 in words is "seventy-eight million, sixty-seven thousand, four hundred".