106805890 has 16 divisors (see below), whose sum is σ = 192371832. Its totient is φ = 42695424.

The previous prime is 106805837. The next prime is 106805891. The reversal of 106805890 is 98508601.

It can be written as a sum of positive squares in 4 ways, for example, as 100460529 + 6345361 = 10023^2 + 2519^2 .

It is a super-2 number, since 2×106805890² = 22814996277384200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (106805891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23482 + ... + 27658.

Almost surely, 2^106805890 is an apocalyptic number.

106805890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

106805890 is a deficient number, since it is larger than the sum of its proper divisors (85565942).

106805890 is a wasteful number, since it uses less digits than its factorization.

106805890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6741.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 106805890 is about 10334.6935126302. The cubic root of 106805890 is about 474.4586852858.

The spelling of 106805890 in words is "one hundred six million, eight hundred five thousand, eight hundred ninety".