18429072 has 40 divisors (see below), whose sum is σ = 49681344. Its totient is φ = 5875584.

The previous prime is 18429067. The next prime is 18429079. The reversal of 18429072 is 27092481.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18429079) 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, 7243 + ... + 9450.

Almost surely, 2^18429072 is an apocalyptic number.

18429072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18429072 is an abundant number, since it is smaller than the sum of its proper divisors (31252272).

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

18429072 is a wasteful number, since it uses less digits than its factorization.

18429072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16727 (or 16721 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 18429072 is about 4292.9095028896. The cubic root of 18429072 is about 264.1401918401.

The spelling of 18429072 in words is "eighteen million, four hundred twenty-nine thousand, seventy-two".