101820378 has 32 divisors (see below), whose sum is σ = 235224000. Its totient is φ = 29039360.

The previous prime is 101820347. The next prime is 101820403. The reversal of 101820378 is 873028101.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44253 + ... + 46496.

It is an arithmetic number, because the mean of its divisors is an integer number (7350750).

Almost surely, 2^101820378 is an apocalyptic number.

101820378 is an abundant number, since it is smaller than the sum of its proper divisors (133403622).

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

101820378 is a wasteful number, since it uses less digits than its factorization.

101820378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90782.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 101820378 is about 10090.6084058396. The cubic root of 101820378 is about 466.9584459875.

Adding to 101820378 its reverse (873028101), we get a palindrome (974848479).

The spelling of 101820378 in words is "one hundred one million, eight hundred twenty thousand, three hundred seventy-eight".