78013626 has 16 divisors (see below), whose sum is σ = 156263904. Its totient is φ = 25965104.

The previous prime is 78013619. The next prime is 78013627. The reversal of 78013626 is 62631087.

It is a super-2 number, since 2×78013626² = 12172251683335752, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78013627) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5421 + ... + 13616.

It is an arithmetic number, because the mean of its divisors is an integer number (9766494).

Almost surely, 2^78013626 is an apocalyptic number.

78013626 is an abundant number, since it is smaller than the sum of its proper divisors (78250278).

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

78013626 is a wasteful number, since it uses less digits than its factorization.

78013626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19725.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 78013626 is about 8832.5322529839. The cubic root of 78013626 is about 427.2907467413.

The spelling of 78013626 in words is "seventy-eight million, thirteen thousand, six hundred twenty-six".