29878940 has 48 divisors (see below), whose sum is σ = 77230272. Its totient is φ = 9455616.

The previous prime is 29878913. The next prime is 29878949. The reversal of 29878940 is 4987892.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29878949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6389 + ... + 10028.

It is an arithmetic number, because the mean of its divisors is an integer number (1608964).

Almost surely, 2^29878940 is an apocalyptic number.

29878940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29878940 is an abundant number, since it is smaller than the sum of its proper divisors (47351332).

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

29878940 is a wasteful number, since it uses less digits than its factorization.

29878940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16446 (or 16444 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 29878940 is about 5466.1631881970. The cubic root of 29878940 is about 310.3047298358.

The spelling of 29878940 in words is "twenty-nine million, eight hundred seventy-eight thousand, nine hundred forty".