29212140 has 24 divisors (see below), whose sum is σ = 81794160. Its totient is φ = 7789888.

The previous prime is 29212123. The next prime is 29212147. The reversal of 29212140 is 4121292.

29212140 = 835² + 836² + ... + 874².

It is not an unprimeable number, because it can be changed into a prime (29212147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243375 + ... + 243494.

It is an arithmetic number, because the mean of its divisors is an integer number (3408090).

Almost surely, 2^29212140 is an apocalyptic number.

29212140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29212140 is an abundant number, since it is smaller than the sum of its proper divisors (52582020).

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

29212140 is a wasteful number, since it uses less digits than its factorization.

29212140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486881 (or 486879 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 29212140 is about 5404.8256216089. The cubic root of 29212140 is about 307.9790141433.

The spelling of 29212140 in words is "twenty-nine million, two hundred twelve thousand, one hundred forty".