78420035 has 8 divisors (see below), whose sum is σ = 94649040. Its totient is φ = 62372704.

The previous prime is 78420029. The next prime is 78420037. The reversal of 78420035 is 53002487.

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 78420035 - 2⁸ = 78419779 is a prime.

It is a super-2 number, since 2×78420035² = 12299403778802450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78420037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44465 + ... + 46194.

It is an arithmetic number, because the mean of its divisors is an integer number (11831130).

Almost surely, 2^78420035 is an apocalyptic number.

78420035 is a deficient number, since it is larger than the sum of its proper divisors (16229005).

78420035 is a wasteful number, since it uses less digits than its factorization.

78420035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90837.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 78420035 is about 8855.5087375035. The cubic root of 78420035 is about 428.0314469426.

The spelling of 78420035 in words is "seventy-eight million, four hundred twenty thousand, thirty-five".