78274136 has 8 divisors (see below), whose sum is σ = 146764020. Its totient is φ = 39137064.

The previous prime is 78274123. The next prime is 78274159. The reversal of 78274136 is 63147287.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×78274136² = 12253680733092992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78274136.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4892126 + ... + 4892141.

Almost surely, 2^78274136 is an apocalyptic number.

It is an amenable number.

78274136 is a deficient number, since it is larger than the sum of its proper divisors (68489884).

78274136 is a wasteful number, since it uses less digits than its factorization.

78274136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9784273 (or 9784269 counting only the distinct ones).

The product of its digits is 56448, while the sum is 38.

The square root of 78274136 is about 8847.2671486737. The cubic root of 78274136 is about 427.7658340000.

The spelling of 78274136 in words is "seventy-eight million, two hundred seventy-four thousand, one hundred thirty-six".