29897140 has 48 divisors (see below), whose sum is σ = 77277312. Its totient is φ = 9461376.

The previous prime is 29897107. The next prime is 29897143. The reversal of 29897140 is 4179892.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 29897093 and 29897102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29897143) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6394 + ... + 10033.

It is an arithmetic number, because the mean of its divisors is an integer number (1609944).

Almost surely, 2^29897140 is an apocalyptic number.

29897140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29897140 is an abundant number, since it is smaller than the sum of its proper divisors (47380172).

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

29897140 is a wasteful number, since it uses less digits than its factorization.

29897140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16456 (or 16454 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 29897140 is about 5467.8277222312. The cubic root of 29897140 is about 310.3677218047.

The spelling of 29897140 in words is "twenty-nine million, eight hundred ninety-seven thousand, one hundred forty".