100023278 has 4 divisors (see below), whose sum is σ = 150034920. Its totient is φ = 50011638.

The previous prime is 100023271. The next prime is 100023283. The reversal of 100023278 is 872320001.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×100023278² = 20009312283730568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100023271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25005818 + ... + 25005821.

It is an arithmetic number, because the mean of its divisors is an integer number (37508730).

Almost surely, 2^100023278 is an apocalyptic number.

100023278 is a deficient number, since it is larger than the sum of its proper divisors (50011642).

100023278 is an equidigital number, since it uses as much as digits as its factorization.

100023278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50011641.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 100023278 is about 10001.1638322747. The cubic root of 100023278 is about 464.1948962020.

Adding to 100023278 its reverse (872320001), we get a palindrome (972343279).

The spelling of 100023278 in words is "one hundred million, twenty-three thousand, two hundred seventy-eight".