29890780 has 12 divisors (see below), whose sum is σ = 62770680. Its totient is φ = 11956304.

The previous prime is 29890747. The next prime is 29890801. The reversal of 29890780 is 8709892.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 747250 + ... + 747289.

It is an arithmetic number, because the mean of its divisors is an integer number (5230890).

Almost surely, 2^29890780 is an apocalyptic number.

29890780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29890780 is an abundant number, since it is smaller than the sum of its proper divisors (32879900).

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

29890780 is a wasteful number, since it uses less digits than its factorization.

29890780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494548 (or 1494546 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 29890780 is about 5467.2461075024. The cubic root of 29890780 is about 310.3457121331.

The spelling of 29890780 in words is "twenty-nine million, eight hundred ninety thousand, seven hundred eighty".