989622890 has 16 divisors (see below), whose sum is σ = 1814932008. Its totient is φ = 388380096.

The previous prime is 989622869. The next prime is 989622913. The reversal of 989622890 is 98226989.

It can be written as a sum of positive squares in 4 ways, for example, as 910892761 + 78730129 = 30181^2 + 8873^2 .

It is a Harshad number since it is a multiple of its sum of digits (53).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 933077 + ... + 934136.

Almost surely, 2^989622890 is an apocalyptic number.

989622890 is a deficient number, since it is larger than the sum of its proper divisors (825309118).

989622890 is a wasteful number, since it uses less digits than its factorization.

989622890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867273.

The product of its (nonzero) digits is 1119744, while the sum is 53.

The square root of 989622890 is about 31458.2722030311. The cubic root of 989622890 is about 996.5289289392.

The spelling of 989622890 in words is "nine hundred eighty-nine million, six hundred twenty-two thousand, eight hundred ninety".