998601906 has 16 divisors (see below), whose sum is σ = 1997554464. Its totient is φ = 332808864.

The previous prime is 998601881. The next prime is 998601907. The reversal of 998601906 is 609106899.

It is not an unprimeable number, because it can be changed into a prime (998601907) 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, 35785 + ... + 57251.

It is an arithmetic number, because the mean of its divisors is an integer number (124847154).

Almost surely, 2^998601906 is an apocalyptic number.

998601906 is an abundant number, since it is smaller than the sum of its proper divisors (998952558).

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

998601906 is a wasteful number, since it uses less digits than its factorization.

998601906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29225.

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 998601906 is about 31600.6630626637. The cubic root of 998601906 is about 999.5337513126.

The spelling of 998601906 in words is "nine hundred ninety-eight million, six hundred one thousand, nine hundred six".