78013774 has 8 divisors (see below), whose sum is σ = 119228760. Its totient is φ = 38270856.

The previous prime is 78013757. The next prime is 78013777. The reversal of 78013774 is 47731087.

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

It is a super-2 number, since 2×78013774² = 12172297867446152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78013777) 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 3 ways as a sum of consecutive naturals, for example, 367884 + ... + 368095.

It is an arithmetic number, because the mean of its divisors is an integer number (14903595).

Almost surely, 2^78013774 is an apocalyptic number.

78013774 is a deficient number, since it is larger than the sum of its proper divisors (41214986).

78013774 is a wasteful number, since it uses less digits than its factorization.

78013774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736034.

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 78013774 is about 8832.5406310982. The cubic root of 78013774 is about 427.2910169462.

It can be divided in two parts, 78013 and 774, that added together give a palindrome (78787).

The spelling of 78013774 in words is "seventy-eight million, thirteen thousand, seven hundred seventy-four".