29720380 has 12 divisors (see below), whose sum is σ = 62412840. Its totient is φ = 11888144.

The previous prime is 29720371. The next prime is 29720399. The reversal of 29720380 is 8302792.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742990 + ... + 743029.

It is an arithmetic number, because the mean of its divisors is an integer number (5201070).

Almost surely, 2^29720380 is an apocalyptic number.

29720380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29720380 is an abundant number, since it is smaller than the sum of its proper divisors (32692460).

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

29720380 is a wasteful number, since it uses less digits than its factorization.

29720380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486028 (or 1486026 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 29720380 is about 5451.6401201840. The cubic root of 29720380 is about 309.7548530159.

The spelling of 29720380 in words is "twenty-nine million, seven hundred twenty thousand, three hundred eighty".