78269774 has 16 divisors (see below), whose sum is σ = 128217600. Its totient is φ = 35538360.

The previous prime is 78269773. The next prime is 78269777. The reversal of 78269774 is 47796287.

It is a super-2 number, since 2×78269774² = 12252315044022152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78269773) 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, 31427 + ... + 33825.

It is an arithmetic number, because the mean of its divisors is an integer number (8013600).

Almost surely, 2^78269774 is an apocalyptic number.

78269774 is a deficient number, since it is larger than the sum of its proper divisors (49947826).

78269774 is a wasteful number, since it uses less digits than its factorization.

78269774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3895.

The product of its digits is 1185408, while the sum is 50.

The square root of 78269774 is about 8847.0206284376. The cubic root of 78269774 is about 427.7578877854.

The spelling of 78269774 in words is "seventy-eight million, two hundred sixty-nine thousand, seven hundred seventy-four".