398432747 has 4 divisors (see below), whose sum is σ = 405950400. Its totient is φ = 390915096.

The previous prime is 398432743. The next prime is 398432767. The reversal of 398432747 is 747234893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 398432747 - 2² = 398432743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398432743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3758747 + ... + 3758852.

It is an arithmetic number, because the mean of its divisors is an integer number (101487600).

Almost surely, 2^398432747 is an apocalyptic number.

398432747 is a deficient number, since it is larger than the sum of its proper divisors (7517653).

398432747 is an equidigital number, since it uses as much as digits as its factorization.

398432747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7517652.

The product of its digits is 1016064, while the sum is 47.

The square root of 398432747 is about 19960.7802202219. The cubic root of 398432747 is about 735.8427386071.

The spelling of 398432747 in words is "three hundred ninety-eight million, four hundred thirty-two thousand, seven hundred forty-seven".