78278132 has 48 divisors (see below), whose sum is σ = 149688000. Its totient is φ = 35679744.

The previous prime is 78278111. The next prime is 78278141. The reversal of 78278132 is 23187287.

It is a super-2 number, since 2×78278132² = 12254931898818848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 437219 + ... + 437397.

It is an arithmetic number, because the mean of its divisors is an integer number (3118500).

Almost surely, 2^78278132 is an apocalyptic number.

It is an amenable number.

78278132 is a deficient number, since it is larger than the sum of its proper divisors (71409868).

78278132 is a wasteful number, since it uses less digits than its factorization.

78278132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 366 counting only the distinct ones).

The product of its digits is 37632, while the sum is 38.

The square root of 78278132 is about 8847.4929782397. The cubic root of 78278132 is about 427.7731132166.

The spelling of 78278132 in words is "seventy-eight million, two hundred seventy-eight thousand, one hundred thirty-two".