108278640 has 80 divisors (see below), whose sum is σ = 372967200. Its totient is φ = 28873728.

The previous prime is 108278623. The next prime is 108278657. The reversal of 108278640 is 46872801.

108278640 is a `hidden beast` number, since 1 + 0 + 8 + 2 + 7 + 8 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (108278623) and next prime (108278657).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 108278595 and 108278604.

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 in 15 ways as a sum of consecutive naturals, for example, 22905 + ... + 27224.

It is an arithmetic number, because the mean of its divisors is an integer number (4662090).

Almost surely, 2^108278640 is an apocalyptic number.

108278640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

108278640 is an abundant number, since it is smaller than the sum of its proper divisors (264688560).

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

108278640 is a wasteful number, since it uses less digits than its factorization.

108278640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50151 (or 50139 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 108278640 is about 10405.7022828832. The cubic root of 108278640 is about 476.6295133533.

The spelling of 108278640 in words is "one hundred eight million, two hundred seventy-eight thousand, six hundred forty".