398287132 has 24 divisors (see below), whose sum is σ = 724348800. Its totient is φ = 191417280.

The previous prime is 398287121. The next prime is 398287133. The reversal of 398287132 is 231782893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398287133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7698 + ... + 29254.

It is an arithmetic number, because the mean of its divisors is an integer number (30181200).

Almost surely, 2^398287132 is an apocalyptic number.

It is an amenable number.

398287132 is a deficient number, since it is larger than the sum of its proper divisors (326061668).

398287132 is a wasteful number, since it uses less digits than its factorization.

398287132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21741 (or 21739 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 398287132 is about 19957.1323591342. The cubic root of 398287132 is about 735.7530850021.

The spelling of 398287132 in words is "three hundred ninety-eight million, two hundred eighty-seven thousand, one hundred thirty-two".