4378921620 has 24 divisors (see below), whose sum is σ = 12260980704. Its totient is φ = 1167712416.

The previous prime is 4378921517. The next prime is 4378921627. The reversal of 4378921620 is 261298734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4378921627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36490954 + ... + 36491073.

It is an arithmetic number, because the mean of its divisors is an integer number (510874196).

Almost surely, 2^4378921620 is an apocalyptic number.

It is an amenable number.

4378921620 is an abundant number, since it is smaller than the sum of its proper divisors (7882059084).

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

4378921620 is a wasteful number, since it uses less digits than its factorization.

4378921620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72982039 (or 72982037 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 4378921620 is about 66173.4207971751. The cubic root of 4378921620 is about 1636.0216902611.

The spelling of 4378921620 in words is "four billion, three hundred seventy-eight million, nine hundred twenty-one thousand, six hundred twenty".