109649856 has 28 divisors (see below), whose sum is σ = 290115752. Its totient is φ = 36549888.

The previous prime is 109649849. The next prime is 109649857. The reversal of 109649856 is 658946901.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109649857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285355 + ... + 285738.

Almost surely, 2^109649856 is an apocalyptic number.

109649856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

109649856 is an abundant number, since it is smaller than the sum of its proper divisors (180465896).

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

109649856 is an equidigital number, since it uses as much as digits as its factorization.

109649856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571108 (or 571098 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 109649856 is about 10471.3827167189. The cubic root of 109649856 is about 478.6330553529.

The spelling of 109649856 in words is "one hundred nine million, six hundred forty-nine thousand, eight hundred fifty-six".