29907972 has 18 divisors (see below), whose sum is σ = 75600798. Its totient is φ = 9969312.

The previous prime is 29907923. The next prime is 29907989. The reversal of 29907972 is 27970992.

It can be written as a sum of positive squares in only one way, i.e., 23677956 + 6230016 = 4866^2 + 2496^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 415353 + ... + 415424.

Almost surely, 2^29907972 is an apocalyptic number.

It is an amenable number.

29907972 is an abundant number, since it is smaller than the sum of its proper divisors (45692826).

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

29907972 is a wasteful number, since it uses less digits than its factorization.

29907972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830787 (or 830782 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The square root of 29907972 is about 5468.8181538610. The cubic root of 29907972 is about 310.4052002751.

It can be divided in two parts, 299079 and 72, that added together give a triangular number (299151 = T₇₇₃).

The spelling of 29907972 in words is "twenty-nine million, nine hundred seven thousand, nine hundred seventy-two".