101099640 has 32 divisors (see below), whose sum is σ = 303299280. Its totient is φ = 26959872.

The previous prime is 101099617. The next prime is 101099657. The reversal of 101099640 is 46990101.

It is a super-2 number, since 2×101099640² = 20442274416259200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 101099598 and 101099607.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 421129 + ... + 421368.

Almost surely, 2^101099640 is an apocalyptic number.

101099640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101099640 is an abundant number, since it is smaller than the sum of its proper divisors (202199640).

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

101099640 is a wasteful number, since it uses less digits than its factorization.

101099640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842511 (or 842507 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 101099640 is about 10054.8316743743. The cubic root of 101099640 is about 465.8540438229.

The spelling of 101099640 in words is "one hundred one million, ninety-nine thousand, six hundred forty".