78064890 has 16 divisors (see below), whose sum is σ = 187355808. Its totient is φ = 20817296.

The previous prime is 78064879. The next prime is 78064907. The reversal of 78064890 is 9846087.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1301052 + ... + 1301111.

It is an arithmetic number, because the mean of its divisors is an integer number (11709738).

Almost surely, 2^78064890 is an apocalyptic number.

78064890 is an abundant number, since it is smaller than the sum of its proper divisors (109290918).

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

78064890 is a wasteful number, since it uses less digits than its factorization.

78064890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2602173.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 78064890 is about 8835.4337754295. The cubic root of 78064890 is about 427.3843194403.

The spelling of 78064890 in words is "seventy-eight million, sixty-four thousand, eight hundred ninety".