120338781 has 16 divisors (see below), whose sum is σ = 162047424. Its totient is φ = 79432704.

The previous prime is 120338749. The next prime is 120338789. The reversal of 120338781 is 187833021.

It is not a de Polignac number, because 120338781 - 2⁵ = 120338749 is a prime.

It is a super-2 number, since 2×120338781² = 28962844425131922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120338789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177415 + ... + 178091.

It is an arithmetic number, because the mean of its divisors is an integer number (10127964).

Almost surely, 2^120338781 is an apocalyptic number.

It is an amenable number.

120338781 is a deficient number, since it is larger than the sum of its proper divisors (41708643).

120338781 is a wasteful number, since it uses less digits than its factorization.

120338781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 120338781 is about 10969.9034179887. The cubic root of 120338781 is about 493.7061486238.

The spelling of 120338781 in words is "one hundred twenty million, three hundred thirty-eight thousand, seven hundred eighty-one".