78764090 has 8 divisors (see below), whose sum is σ = 141775380. Its totient is φ = 31505632.

The previous prime is 78764069. The next prime is 78764113. The reversal of 78764090 is 9046787.

It can be written as a sum of positive squares in 2 ways, for example, as 73085401 + 5678689 = 8549^2 + 2383^2 .

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

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 3938195 + ... + 3938214.

Almost surely, 2^78764090 is an apocalyptic number.

78764090 is a deficient number, since it is larger than the sum of its proper divisors (63011290).

78764090 is a wasteful number, since it uses less digits than its factorization.

78764090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7876416.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 78764090 is about 8874.9135207054. The cubic root of 78764090 is about 428.6565062314.

The spelling of 78764090 in words is "seventy-eight million, seven hundred sixty-four thousand, ninety".