78498011 has 4 divisors (see below), whose sum is σ = 81910992. Its totient is φ = 75085032.

The previous prime is 78498001. The next prime is 78498023. The reversal of 78498011 is 11089487.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78498011 - 2¹⁸ = 78235867 is a prime.

It is a super-2 number, since 2×78498011² = 12323875461912242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78498001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1706456 + ... + 1706501.

It is an arithmetic number, because the mean of its divisors is an integer number (20477748).

Almost surely, 2^78498011 is an apocalyptic number.

78498011 is a deficient number, since it is larger than the sum of its proper divisors (3412981).

78498011 is a wasteful number, since it uses less digits than its factorization.

78498011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3412980.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 78498011 is about 8859.9103268600. The cubic root of 78498011 is about 428.1732692198.

The spelling of 78498011 in words is "seventy-eight million, four hundred ninety-eight thousand, eleven".