120847440 has 80 divisors (see below), whose sum is σ = 428151168. Its totient is φ = 27621888.

The previous prime is 120847423. The next prime is 120847477. The reversal of 120847440 is 44748021.

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 (30).

It is a junction number, because it is equal to n+sod(n) for n = 120847398 and 120847407.

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, 34287 + ... + 37646.

Almost surely, 2^120847440 is an apocalyptic number.

120847440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120847440 is an abundant number, since it is smaller than the sum of its proper divisors (307303728).

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

120847440 is a wasteful number, since it uses less digits than its factorization.

120847440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71956 (or 71950 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 120847440 is about 10993.0632673518. The cubic root of 120847440 is about 494.4007849717.

The spelling of 120847440 in words is "one hundred twenty million, eight hundred forty-seven thousand, four hundred forty".