78166240 has 24 divisors (see below), whose sum is σ = 184668120. Its totient is φ = 31266432.

The previous prime is 78166211. The next prime is 78166267. The reversal of 78166240 is 4266187.

It is a super-2 number, since 2×78166240² = 12219922151475200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78166196 and 78166205.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 244110 + ... + 244429.

It is an arithmetic number, because the mean of its divisors is an integer number (7694505).

Almost surely, 2^78166240 is an apocalyptic number.

It is an amenable number.

78166240 is an abundant number, since it is smaller than the sum of its proper divisors (106501880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78166240 is a wasteful number, since it uses less digits than its factorization.

78166240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488554 (or 488546 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 78166240 is about 8841.1673437392. The cubic root of 78166240 is about 427.5691941393.

The spelling of 78166240 in words is "seventy-eight million, one hundred sixty-six thousand, two hundred forty".