399758142 has 32 divisors (see below), whose sum is σ = 915282432. Its totient is φ = 114022944.

The previous prime is 399758131. The next prime is 399758167. The reversal of 399758142 is 241857993.

It is a junction number, because it is equal to n+sod(n) for n = 399758091 and 399758100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17983 + ... + 33509.

It is an arithmetic number, because the mean of its divisors is an integer number (28602576).

Almost surely, 2^399758142 is an apocalyptic number.

399758142 is an abundant number, since it is smaller than the sum of its proper divisors (515524290).

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

399758142 is a wasteful number, since it uses less digits than its factorization.

399758142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16152.

The product of its digits is 544320, while the sum is 48.

The square root of 399758142 is about 19993.9526357346. The cubic root of 399758142 is about 736.6577677060.

The spelling of 399758142 in words is "three hundred ninety-nine million, seven hundred fifty-eight thousand, one hundred forty-two".