81410890 has 16 divisors (see below), whose sum is σ = 159861600. Its totient is φ = 29603920.

The previous prime is 81410887. The next prime is 81410933. The reversal of 81410890 is 9801418.

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, 369940 + ... + 370159.

It is an arithmetic number, because the mean of its divisors is an integer number (9991350).

Almost surely, 2^81410890 is an apocalyptic number.

81410890 is a deficient number, since it is larger than the sum of its proper divisors (78450710).

81410890 is a wasteful number, since it uses less digits than its factorization.

81410890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740117.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 81410890 is about 9022.7983464112. The cubic root of 81410890 is about 433.4052497340.

The spelling of 81410890 in words is "eighty-one million, four hundred ten thousand, eight hundred ninety".