29155140 has 144 divisors (see below), whose sum is σ = 104936832. Its totient is φ = 6656256.

The previous prime is 29155123. The next prime is 29155151. The reversal of 29155140 is 4155192.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33592 + ... + 34448.

It is an arithmetic number, because the mean of its divisors is an integer number (728728).

Almost surely, 2^29155140 is an apocalyptic number.

29155140 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 29155140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52468416).

29155140 is an abundant number, since it is smaller than the sum of its proper divisors (75781692).

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

29155140 is a wasteful number, since it uses less digits than its factorization.

29155140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888 (or 874 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 29155140 is about 5399.5499812484. The cubic root of 29155140 is about 307.7785696923.

The spelling of 29155140 in words is "twenty-nine million, one hundred fifty-five thousand, one hundred forty".