109408428 has 24 divisors (see below), whose sum is σ = 283651760. Its totient is φ = 36469440.

The previous prime is 109408427. The next prime is 109408477. The reversal of 109408428 is 824804901.

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 = 109408392 and 109408401.

It is not an unprimeable number, because it can be changed into a prime (109408427) 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, 506413 + ... + 506628.

Almost surely, 2^109408428 is an apocalyptic number.

109408428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

109408428 is an abundant number, since it is smaller than the sum of its proper divisors (174243332).

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

109408428 is a wasteful number, since it uses less digits than its factorization.

109408428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013054 (or 1013046 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 109408428 is about 10459.8483736620. The cubic root of 109408428 is about 478.2815110837.

The spelling of 109408428 in words is "one hundred nine million, four hundred eight thousand, four hundred twenty-eight".