29889720 has 192 divisors, whose sum is σ = 115128000. Its totient is φ = 6580224.

The previous prime is 29889707. The next prime is 29889731. The reversal of 29889720 is 2798892.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72876 + ... + 73284.

It is an arithmetic number, because the mean of its divisors is an integer number (599625).

Almost surely, 2^29889720 is an apocalyptic number.

29889720 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 29889720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57564000).

29889720 is an abundant number, since it is smaller than the sum of its proper divisors (85238280).

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

29889720 is a wasteful number, since it uses less digits than its factorization.

29889720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 455 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 29889720 is about 5467.1491656987. The cubic root of 29889720 is about 310.3420435510.

It can be divided in two parts, 29889 and 720, that multiplied together give a triangular number (21520080 = T₆₅₆₀).

The spelling of 29889720 in words is "twenty-nine million, eight hundred eighty-nine thousand, seven hundred twenty".