101646640 has 40 divisors (see below), whose sum is σ = 236904480. Its totient is φ = 40559616.

The previous prime is 101646631. The next prime is 101646641. The reversal of 101646640 is 46646101.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 101646599 and 101646608.

It is not an unprimeable number, because it can be changed into a prime (101646641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37656 + ... + 40264.

It is an arithmetic number, because the mean of its divisors is an integer number (5922612).

Almost surely, 2^101646640 is an apocalyptic number.

101646640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101646640 is an abundant number, since it is smaller than the sum of its proper divisors (135257840).

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

101646640 is a wasteful number, since it uses less digits than its factorization.

101646640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3109 (or 3103 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 101646640 is about 10081.9958341590. The cubic root of 101646640 is about 466.6927014954.

The spelling of 101646640 in words is "one hundred one million, six hundred forty-six thousand, six hundred forty".