100256388 has 48 divisors (see below), whose sum is σ = 249957120. Its totient is φ = 31182624.

The previous prime is 100256381. The next prime is 100256411. The reversal of 100256388 is 883652001.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (100256381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11995 + ... + 18557.

It is an arithmetic number, because the mean of its divisors is an integer number (5207440).

Almost surely, 2^100256388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100256388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124978560).

100256388 is an abundant number, since it is smaller than the sum of its proper divisors (149700732).

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

100256388 is a wasteful number, since it uses less digits than its factorization.

100256388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6656 (or 6654 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 100256388 is about 10012.8111936658. The cubic root of 100256388 is about 464.5552273871. Note that the first 3 decimals are identical.

The spelling of 100256388 in words is "one hundred million, two hundred fifty-six thousand, three hundred eighty-eight".