29143820 has 24 divisors (see below), whose sum is σ = 61344864. Its totient is φ = 11630336.

The previous prime is 29143771. The next prime is 29143823. The reversal of 29143820 is 2834192.

29143820 = 834² + 835² + ... + 873².

It is not an unprimeable number, because it can be changed into a prime (29143823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8612 + ... + 11508.

It is an arithmetic number, because the mean of its divisors is an integer number (2556036).

Almost surely, 2^29143820 is an apocalyptic number.

29143820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29143820 is an abundant number, since it is smaller than the sum of its proper divisors (32201044).

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

29143820 is a wasteful number, since it uses less digits than its factorization.

29143820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3409 (or 3407 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 29143820 is about 5398.5016439749. The cubic root of 29143820 is about 307.7387310404.

The spelling of 29143820 in words is "twenty-nine million, one hundred forty-three thousand, eight hundred twenty".