89961890 has 16 divisors (see below), whose sum is σ = 162062208. Its totient is φ = 35955696.

The previous prime is 89961889. The next prime is 89961917. The reversal of 89961890 is 9816998.

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, 12989 + ... + 18671.

It is an arithmetic number, because the mean of its divisors is an integer number (10128888).

Almost surely, 2^89961890 is an apocalyptic number.

89961890 is a deficient number, since it is larger than the sum of its proper divisors (72100318).

89961890 is a wasteful number, since it uses less digits than its factorization.

89961890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7273.

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 89961890 is about 9484.8241944698. The cubic root of 89961890 is about 448.0772115273.

The spelling of 89961890 in words is "eighty-nine million, nine hundred sixty-one thousand, eight hundred ninety".