399000742 has 32 divisors (see below), whose sum is σ = 693116928. Its totient is φ = 168738336.

The previous prime is 399000737. The next prime is 399000769. The reversal of 399000742 is 247000993.

It is a junction number, because it is equal to n+sod(n) for n = 399000698 and 399000707.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 366523 + ... + 367609.

It is an arithmetic number, because the mean of its divisors is an integer number (21659904).

Almost surely, 2^399000742 is an apocalyptic number.

399000742 is a deficient number, since it is larger than the sum of its proper divisors (294116186).

399000742 is a wasteful number, since it uses less digits than its factorization.

399000742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 399000742 is about 19975.0029286606. The cubic root of 399000742 is about 736.1922384479.

The spelling of 399000742 in words is "three hundred ninety-nine million, seven hundred forty-two", and thus it is an aban number.