28987629 has 8 divisors (see below), whose sum is σ = 42163872. Its totient is φ = 17568240.

The previous prime is 28987603. The next prime is 28987639. The reversal of 28987629 is 92678982.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28987629 - 2⁸ = 28987373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28987639) 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, 439174 + ... + 439239.

It is an arithmetic number, because the mean of its divisors is an integer number (5270484).

Almost surely, 2^28987629 is an apocalyptic number.

It is an amenable number.

28987629 is a deficient number, since it is larger than the sum of its proper divisors (13176243).

28987629 is a wasteful number, since it uses less digits than its factorization.

28987629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878427.

The product of its digits is 870912, while the sum is 51.

The square root of 28987629 is about 5384.0160660979. The cubic root of 28987629 is about 307.1879894223.

The spelling of 28987629 in words is "twenty-eight million, nine hundred eighty-seven thousand, six hundred twenty-nine".