29745540 has 144 divisors (see below), whose sum is σ = 100166976. Its totient is φ = 7084800.

The previous prime is 29745517. The next prime is 29745553. The reversal of 29745540 is 4554792.

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

It is a junction number, because it is equal to n+sod(n) for n = 29745495 and 29745504.

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 47 ways as a sum of consecutive naturals, for example, 164250 + ... + 164430.

It is an arithmetic number, because the mean of its divisors is an integer number (695604).

Almost surely, 2^29745540 is an apocalyptic number.

29745540 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 29745540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50083488).

29745540 is an abundant number, since it is smaller than the sum of its proper divisors (70421436).

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

29745540 is a wasteful number, since it uses less digits than its factorization.

29745540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290 (or 285 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 29745540 is about 5453.9471944638. The cubic root of 29745540 is about 309.8422367566.

The spelling of 29745540 in words is "twenty-nine million, seven hundred forty-five thousand, five hundred forty".