29399820 has 48 divisors (see below), whose sum is σ = 82870368. Its totient is φ = 7787520.

The previous prime is 29399791. The next prime is 29399833. The reversal of 29399820 is 2899392.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7860 + ... + 10980.

It is an arithmetic number, because the mean of its divisors is an integer number (1726466).

Almost surely, 2^29399820 is an apocalyptic number.

29399820 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 29399820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41435184).

29399820 is an abundant number, since it is smaller than the sum of its proper divisors (53470548).

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

29399820 is a wasteful number, since it uses less digits than its factorization.

29399820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3290 (or 3288 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 29399820 is about 5422.1600861649. The cubic root of 29399820 is about 308.6371669415.

The spelling of 29399820 in words is "twenty-nine million, three hundred ninety-nine thousand, eight hundred twenty".