79778894 has 8 divisors (see below), whose sum is σ = 128873640. Its totient is φ = 36821016.

The previous prime is 79778863. The next prime is 79778899. The reversal of 79778894 is 49887797.

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

It is a super-3 number, since 3×79778894³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79778899) 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 3 ways as a sum of consecutive naturals, for example, 1534184 + ... + 1534235.

It is an arithmetic number, because the mean of its divisors is an integer number (16109205).

Almost surely, 2^79778894 is an apocalyptic number.

79778894 is a deficient number, since it is larger than the sum of its proper divisors (49094746).

79778894 is a wasteful number, since it uses less digits than its factorization.

79778894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3068434.

The product of its digits is 7112448, while the sum is 59.

The square root of 79778894 is about 8931.9031566626. The cubic root of 79778894 is about 430.4896063657.

The spelling of 79778894 in words is "seventy-nine million, seven hundred seventy-eight thousand, eight hundred ninety-four".