29973428 has 6 divisors (see below), whose sum is σ = 52453506. Its totient is φ = 14986712.

The previous prime is 29973421. The next prime is 29973457. The reversal of 29973428 is 82437992.

It can be written as a sum of positive squares in only one way, i.e., 23931664 + 6041764 = 4892^2 + 2458^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29973421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3746675 + ... + 3746682.

It is an arithmetic number, because the mean of its divisors is an integer number (8742251).

Almost surely, 2^29973428 is an apocalyptic number.

It is an amenable number.

29973428 is a deficient number, since it is larger than the sum of its proper divisors (22480078).

29973428 is a wasteful number, since it uses less digits than its factorization.

29973428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7493361 (or 7493359 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 29973428 is about 5474.7993570541. The cubic root of 29973428 is about 310.6314841830.

The spelling of 29973428 in words is "twenty-nine million, nine hundred seventy-three thousand, four hundred twenty-eight".