101326640 has 20 divisors (see below), whose sum is σ = 235584624. Its totient is φ = 40530624.

The previous prime is 101326607. The next prime is 101326699. The reversal of 101326640 is 46623101.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 633212 + ... + 633371.

Almost surely, 2^101326640 is an apocalyptic number.

101326640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101326640 is an abundant number, since it is smaller than the sum of its proper divisors (134257984).

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

101326640 is a wasteful number, since it uses less digits than its factorization.

101326640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266596 (or 1266590 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 101326640 is about 10066.1134505826. The cubic root of 101326640 is about 466.2024453939.

Adding to 101326640 its reverse (46623101), we get a palindrome (147949741).

The spelling of 101326640 in words is "one hundred one million, three hundred twenty-six thousand, six hundred forty".