82623890 has 16 divisors (see below), whose sum is σ = 151162200. Its totient is φ = 32507520.

The previous prime is 82623883. The next prime is 82623899. The reversal of 82623890 is 9832628.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 70879561 + 11744329 = 8419^2 + 3427^2 .

It is not an unprimeable number, because it can be changed into a prime (82623899) 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, 67115 + ... + 68334.

Almost surely, 2^82623890 is an apocalyptic number.

82623890 is a deficient number, since it is larger than the sum of its proper divisors (68538310).

82623890 is a wasteful number, since it uses less digits than its factorization.

82623890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135517.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 82623890 is about 9089.7684238929. The cubic root of 82623890 is about 435.5471865101.

The spelling of 82623890 in words is "eighty-two million, six hundred twenty-three thousand, eight hundred ninety".