29278980 has 144 divisors (see below), whose sum is σ = 94348800. Its totient is φ = 7338240.

The previous prime is 29278967. The next prime is 29278987. The reversal of 29278980 is 8987292.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (29278987) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 370581 + ... + 370659.

It is an arithmetic number, because the mean of its divisors is an integer number (655200).

Almost surely, 2^29278980 is an apocalyptic number.

29278980 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 29278980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47174400).

29278980 is an abundant number, since it is smaller than the sum of its proper divisors (65069820).

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

29278980 is a wasteful number, since it uses less digits than its factorization.

29278980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 29278980 is about 5411.0054518546. The cubic root of 29278980 is about 308.2137297659.

The spelling of 29278980 in words is "twenty-nine million, two hundred seventy-eight thousand, nine hundred eighty".