898561890 has 32 divisors (see below), whose sum is σ = 2396165760. Its totient is φ = 239616432.

The previous prime is 898561831. The next prime is 898561913. The reversal of 898561890 is 98165898.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1663734 + ... + 1664273.

It is an arithmetic number, because the mean of its divisors is an integer number (74880180).

Almost surely, 2^898561890 is an apocalyptic number.

898561890 is an abundant number, since it is smaller than the sum of its proper divisors (1497603870).

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

898561890 is a wasteful number, since it uses less digits than its factorization.

898561890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3328023 (or 3328017 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

The square root of 898561890 is about 29976.0219175260. The cubic root of 898561890 is about 964.9748586253.

The spelling of 898561890 in words is "eight hundred ninety-eight million, five hundred sixty-one thousand, eight hundred ninety".