398971026 has 48 divisors (see below), whose sum is σ = 873905760. Its totient is φ = 131544000.

The previous prime is 398971019. The next prime is 398971099. The reversal of 398971026 is 620179893.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1052505 + ... + 1052883.

It is an arithmetic number, because the mean of its divisors is an integer number (18206370).

Almost surely, 2^398971026 is an apocalyptic number.

398971026 is an abundant number, since it is smaller than the sum of its proper divisors (474934734).

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

398971026 is a wasteful number, since it uses less digits than its factorization.

398971026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 398971026 is about 19974.2590851325. The cubic root of 398971026 is about 736.1739617637.

The spelling of 398971026 in words is "three hundred ninety-eight million, nine hundred seventy-one thousand, twenty-six".