78140236 has 24 divisors (see below), whose sum is σ = 144406080. Its totient is φ = 36894672.

The previous prime is 78140221. The next prime is 78140261. The reversal of 78140236 is 63204187.

It is a super-2 number, since 2×78140236² = 12211792964271392, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78140198 and 78140207.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 24891 + ... + 27853.

It is an arithmetic number, because the mean of its divisors is an integer number (6016920).

Almost surely, 2^78140236 is an apocalyptic number.

78140236 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

78140236 is a deficient number, since it is larger than the sum of its proper divisors (66265844).

78140236 is a wasteful number, since it uses less digits than its factorization.

78140236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333 (or 3331 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 78140236 is about 8839.6966011283. The cubic root of 78140236 is about 427.5217749359.

The spelling of 78140236 in words is "seventy-eight million, one hundred forty thousand, two hundred thirty-six".