78038013 has 4 divisors (see below), whose sum is σ = 104050688. Its totient is φ = 52025340.

The previous prime is 78038003. The next prime is 78038027. The reversal of 78038013 is 31083087.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 78038013 - 2⁹ = 78037501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78038003) 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, 13006333 + ... + 13006338.

It is an arithmetic number, because the mean of its divisors is an integer number (26012672).

Almost surely, 2^78038013 is an apocalyptic number.

It is an amenable number.

78038013 is a deficient number, since it is larger than the sum of its proper divisors (26012675).

78038013 is a wasteful number, since it uses less digits than its factorization.

78038013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26012674.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 78038013 is about 8833.9126665368. The cubic root of 78038013 is about 427.3352656900.

The spelling of 78038013 in words is "seventy-eight million, thirty-eight thousand, thirteen".