29028720 has 160 divisors (see below), whose sum is σ = 105850368. Its totient is φ = 6441984.

The previous prime is 29028689. The next prime is 29028721. The reversal of 29028720 is 2782092.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29028721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61927 + ... + 62393.

Almost surely, 2^29028720 is an apocalyptic number.

29028720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29028720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52925184).

29028720 is an abundant number, since it is smaller than the sum of its proper divisors (76821648).

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

29028720 is a wasteful number, since it uses less digits than its factorization.

29028720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 29028720 is about 5387.8307323078. The cubic root of 29028720 is about 307.3330708754. Note that the first 3 decimals are identical.

The spelling of 29028720 in words is "twenty-nine million, twenty-eight thousand, seven hundred twenty".