29440728 has 48 divisors (see below), whose sum is σ = 83935800. Its totient is φ = 9296640.

The previous prime is 29440727. The next prime is 29440739. The reversal of 29440728 is 82704492.

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 = 29440692 and 29440701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29440727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9393 + ... + 12128.

Almost surely, 2^29440728 is an apocalyptic number.

It is an amenable number.

29440728 is an abundant number, since it is smaller than the sum of its proper divisors (54495072).

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

29440728 is a wasteful number, since it uses less digits than its factorization.

29440728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21552 (or 21545 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 29440728 is about 5425.9310721755. The cubic root of 29440728 is about 308.7802503320.

The spelling of 29440728 in words is "twenty-nine million, four hundred forty thousand, seven hundred twenty-eight".