29972740 has 24 divisors (see below), whose sum is σ = 71934912. Its totient is φ = 10276320.

The previous prime is 29972737. The next prime is 29972741. The reversal of 29972740 is 4727992.

It is a junction number, because it is equal to n+sod(n) for n = 29972693 and 29972702.

It is not an unprimeable number, because it can be changed into a prime (29972741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106906 + ... + 107185.

It is an arithmetic number, because the mean of its divisors is an integer number (2997288).

Almost surely, 2^29972740 is an apocalyptic number.

29972740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29972740 is an abundant number, since it is smaller than the sum of its proper divisors (41962172).

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

29972740 is a wasteful number, since it uses less digits than its factorization.

29972740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214107 (or 214105 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 29972740 is about 5474.7365233406. The cubic root of 29972740 is about 310.6291074546.

The spelling of 29972740 in words is "twenty-nine million, nine hundred seventy-two thousand, seven hundred forty".