82743890 has 16 divisors (see below), whose sum is σ = 150028632. Its totient is φ = 32855424.

The previous prime is 82743887. The next prime is 82743893. The reversal of 82743890 is 9834728.

It is an interprime number because it is at equal distance from previous prime (82743887) and next prime (82743893).

It can be written as a sum of positive squares in 4 ways, for example, as 58997761 + 23746129 = 7681^2 + 4873^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82743893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28829 + ... + 31568.

Almost surely, 2^82743890 is an apocalyptic number.

82743890 is a deficient number, since it is larger than the sum of its proper divisors (67284742).

82743890 is a wasteful number, since it uses less digits than its factorization.

82743890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60541.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 82743890 is about 9096.3668571579. The cubic root of 82743890 is about 435.7579422606.

The spelling of 82743890 in words is "eighty-two million, seven hundred forty-three thousand, eight hundred ninety".