101947428 has 36 divisors (see below), whose sum is σ = 281128848. Its totient is φ = 30893040.

The previous prime is 101947423. The next prime is 101947429. The reversal of 101947428 is 824749101.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 101947392 and 101947401.

It is not an unprimeable number, because it can be changed into a prime (101947421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128326 + ... + 129117.

Almost surely, 2^101947428 is an apocalyptic number.

101947428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

101947428 is an abundant number, since it is smaller than the sum of its proper divisors (179181420).

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

101947428 is a wasteful number, since it uses less digits than its factorization.

101947428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257464 (or 257459 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 101947428 is about 10096.9019010784. The cubic root of 101947428 is about 467.1525866006.

The spelling of 101947428 in words is "one hundred one million, nine hundred forty-seven thousand, four hundred twenty-eight".