120678640 has 40 divisors (see below), whose sum is σ = 287111088. Its totient is φ = 47147520.

The previous prime is 120678617. The next prime is 120678647. The reversal of 120678640 is 46876021.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 120678596 and 120678605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120678647) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14101 + ... + 20980.

Almost surely, 2^120678640 is an apocalyptic number.

120678640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120678640 is an abundant number, since it is smaller than the sum of its proper divisors (166432448).

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

120678640 is a wasteful number, since it uses less digits than its factorization.

120678640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35137 (or 35131 counting only the distinct ones).

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

The square root of 120678640 is about 10985.3830156258. The cubic root of 120678640 is about 494.1704843013.

The spelling of 120678640 in words is "one hundred twenty million, six hundred seventy-eight thousand, six hundred forty".