101229940 has 24 divisors (see below), whose sum is σ = 242952192. Its totient is φ = 34707360.

The previous prime is 101229937. The next prime is 101229971. The reversal of 101229940 is 49922101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 101229899 and 101229908.

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, 361396 + ... + 361675.

It is an arithmetic number, because the mean of its divisors is an integer number (10123008).

Almost surely, 2^101229940 is an apocalyptic number.

101229940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101229940 is an abundant number, since it is smaller than the sum of its proper divisors (141722252).

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

101229940 is a wasteful number, since it uses less digits than its factorization.

101229940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723087 (or 723085 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 101229940 is about 10061.3090599584. The cubic root of 101229940 is about 466.0540930778.

The spelling of 101229940 in words is "one hundred one million, two hundred twenty-nine thousand, nine hundred forty".