29621988 has 144 divisors (see below), whose sum is σ = 89456640. Its totient is φ = 8164800.

The previous prime is 29621983. The next prime is 29621993. The reversal of 29621988 is 88912692.

It is an interprime number because it is at equal distance from previous prime (29621983) and next prime (29621993).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29621983) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 233181 + ... + 233307.

Almost surely, 2^29621988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29621988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44728320).

29621988 is an abundant number, since it is smaller than the sum of its proper divisors (59834652).

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

29621988 is a wasteful number, since it uses less digits than its factorization.

29621988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 193 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 29621988 is about 5442.6085657523. The cubic root of 29621988 is about 309.4126513099.

It can be divided in two parts, 2962 and 1988, that added together give a triangular number (4950 = T₉₉).

The spelling of 29621988 in words is "twenty-nine million, six hundred twenty-one thousand, nine hundred eighty-eight".