78258011 has 8 divisors (see below), whose sum is σ = 84509040. Its totient is φ = 72040032.

The previous prime is 78257989. The next prime is 78258041. The reversal of 78258011 is 11085287.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 78258011 - 2⁶ = 78257947 is a prime.

It is a super-2 number, since 2×78258011² = 12248632571352242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78258041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3221 + ... + 12918.

It is an arithmetic number, because the mean of its divisors is an integer number (10563630).

Almost surely, 2^78258011 is an apocalyptic number.

78258011 is a deficient number, since it is larger than the sum of its proper divisors (6251029).

78258011 is a wasteful number, since it uses less digits than its factorization.

78258011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16525.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 78258011 is about 8846.3558033803. The cubic root of 78258011 is about 427.7364577669.

The spelling of 78258011 in words is "seventy-eight million, two hundred fifty-eight thousand, eleven".