29725380 has 120 divisors (see below), whose sum is σ = 95135040. Its totient is φ = 7767360.

The previous prime is 29725363. The next prime is 29725403. The reversal of 29725380 is 8352792.

It is a happy number.

It is a super-2 number, since 2×29725380² = 1767196432288800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 95425 + ... + 95735.

It is an arithmetic number, because the mean of its divisors is an integer number (792792).

Almost surely, 2^29725380 is an apocalyptic number.

29725380 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 29725380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47567520).

29725380 is an abundant number, since it is smaller than the sum of its proper divisors (65409660).

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

29725380 is a wasteful number, since it uses less digits than its factorization.

29725380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 29725380 is about 5452.0986784907. The cubic root of 29725380 is about 309.7722225495.

The spelling of 29725380 in words is "twenty-nine million, seven hundred twenty-five thousand, three hundred eighty".