29187990 has 144 divisors (see below), whose sum is σ = 87356880. Its totient is φ = 6739200.

The previous prime is 29187973. The next prime is 29188021. The reversal of 29187990 is 9978192.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 288940 + ... + 289040.

It is an arithmetic number, because the mean of its divisors is an integer number (606645).

Almost surely, 2^29187990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29187990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43678440).

29187990 is an abundant number, since it is smaller than the sum of its proper divisors (58168890).

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

29187990 is a wasteful number, since it uses less digits than its factorization.

29187990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 29187990 is about 5402.5910450450. The cubic root of 29187990 is about 307.8941208565.

The spelling of 29187990 in words is "twenty-nine million, one hundred eighty-seven thousand, nine hundred ninety".