398655742 has 8 divisors (see below), whose sum is σ = 604702800. Its totient is φ = 197088144.

The previous prime is 398655737. The next prime is 398655781. The reversal of 398655742 is 247556893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1119642 + ... + 1119997.

It is an arithmetic number, because the mean of its divisors is an integer number (75587850).

Almost surely, 2^398655742 is an apocalyptic number.

398655742 is a deficient number, since it is larger than the sum of its proper divisors (206047058).

398655742 is a wasteful number, since it uses less digits than its factorization.

398655742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2239730.

The product of its digits is 1814400, while the sum is 49.

The square root of 398655742 is about 19966.3652676194. The cubic root of 398655742 is about 735.9799919242.

The spelling of 398655742 in words is "three hundred ninety-eight million, six hundred fifty-five thousand, seven hundred forty-two".