100039890 has 16 divisors (see below), whose sum is σ = 240095808. Its totient is φ = 26677296.

The previous prime is 100039889. The next prime is 100039943. The reversal of 100039890 is 98930001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 3334663 = 100039890 / (1 + 0 + 0 + 0 + 3 + 9 + 8 + 9 + 0).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1667302 + ... + 1667361.

It is an arithmetic number, because the mean of its divisors is an integer number (15005988).

Almost surely, 2^100039890 is an apocalyptic number.

100039890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100039890 is an abundant number, since it is smaller than the sum of its proper divisors (140055918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100039890 is a wasteful number, since it uses less digits than its factorization.

100039890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334673.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 100039890 is about 10001.9943011381. The cubic root of 100039890 is about 464.2205928162.

Adding to 100039890 its reverse (98930001), we get a palindrome (198969891).

The spelling of 100039890 in words is "one hundred million, thirty-nine thousand, eight hundred ninety".