391550142 has 16 divisors (see below), whose sum is σ = 783302400. Its totient is φ = 130483032.

The previous prime is 391550111. The next prime is 391550143. The reversal of 391550142 is 241055193.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391550143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30859 + ... + 41657.

It is an arithmetic number, because the mean of its divisors is an integer number (48956400).

Almost surely, 2^391550142 is an apocalyptic number.

391550142 is an abundant number, since it is smaller than the sum of its proper divisors (391752258).

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

391550142 is a wasteful number, since it uses less digits than its factorization.

391550142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16847.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 391550142 is about 19787.6259819110. The cubic root of 391550142 is about 731.5810743069.

The spelling of 391550142 in words is "three hundred ninety-one million, five hundred fifty thousand, one hundred forty-two".