117906428 has 6 divisors (see below), whose sum is σ = 206336256. Its totient is φ = 58953212.

The previous prime is 117906421. The next prime is 117906433. The reversal of 117906428 is 824609711.

It is a junction number, because it is equal to n+sod(n) for n = 117906391 and 117906400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117906421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14738300 + ... + 14738307.

It is an arithmetic number, because the mean of its divisors is an integer number (34389376).

Almost surely, 2^117906428 is an apocalyptic number.

It is an amenable number.

117906428 is a deficient number, since it is larger than the sum of its proper divisors (88429828).

117906428 is a wasteful number, since it uses less digits than its factorization.

117906428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29476611 (or 29476609 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 117906428 is about 10858.4726366096. The cubic root of 117906428 is about 490.3571296242.

The spelling of 117906428 in words is "one hundred seventeen million, nine hundred six thousand, four hundred twenty-eight".