29979740 has 24 divisors (see below), whose sum is σ = 71951712. Its totient is φ = 10278720.

The previous prime is 29979737. The next prime is 29979769. The reversal of 29979740 is 4797992.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106931 + ... + 107210.

It is an arithmetic number, because the mean of its divisors is an integer number (2997988).

Almost surely, 2^29979740 is an apocalyptic number.

29979740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29979740 is an abundant number, since it is smaller than the sum of its proper divisors (41971972).

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

29979740 is a wasteful number, since it uses less digits than its factorization.

29979740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214157 (or 214155 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 29979740 is about 5475.3757861904. The cubic root of 29979740 is about 310.6532875874.

The spelling of 29979740 in words is "twenty-nine million, nine hundred seventy-nine thousand, seven hundred forty".