28929642 has 32 divisors (see below), whose sum is σ = 66969600. Its totient is φ = 8160048.

The previous prime is 28929623. The next prime is 28929643. The reversal of 28929642 is 24692982.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 28929594 and 28929603.

It is not an unprimeable number, because it can be changed into a prime (28929643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1042 + ... + 7677.

It is an arithmetic number, because the mean of its divisors is an integer number (2092800).

Almost surely, 2^28929642 is an apocalyptic number.

28929642 is an abundant number, since it is smaller than the sum of its proper divisors (38039958).

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

28929642 is a wasteful number, since it uses less digits than its factorization.

28929642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8810.

The product of its digits is 124416, while the sum is 42.

The square root of 28929642 is about 5378.6282637862. The cubic root of 28929642 is about 306.9830192166.

The spelling of 28929642 in words is "twenty-eight million, nine hundred twenty-nine thousand, six hundred forty-two".