120029978 has 4 divisors (see below), whose sum is σ = 180044970. Its totient is φ = 60014988.

The previous prime is 120029977. The next prime is 120030007. The reversal of 120029978 is 879920021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 879920021 = 1153 ⋅763157.

It can be written as a sum of positive squares in only one way, i.e., 77035729 + 42994249 = 8777^2 + 6557^2 .

It is not an unprimeable number, because it can be changed into a prime (120029971) 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 as a sum of consecutive naturals, namely, 30007493 + ... + 30007496.

Almost surely, 2^120029978 is an apocalyptic number.

120029978 is a deficient number, since it is larger than the sum of its proper divisors (60014992).

120029978 is an equidigital number, since it uses as much as digits as its factorization.

120029978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60014991.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 120029978 is about 10955.8193668936. The cubic root of 120029978 is about 493.2834848383.

Adding to 120029978 its reverse (879920021), we get a palindrome (999949999).

The spelling of 120029978 in words is "one hundred twenty million, twenty-nine thousand, nine hundred seventy-eight".