29928531 has 8 divisors (see below), whose sum is σ = 40125904. Its totient is φ = 19841760.

The previous prime is 29928529. The next prime is 29928533. The reversal of 29928531 is 13582992.

It is an interprime number because it is at equal distance from previous prime (29928529) and next prime (29928533).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 29928531 - 2¹ = 29928529 is a prime.

It is a super-2 number, since 2×29928531² = 1791433935635922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 29928531.

It is not an unprimeable number, because it can be changed into a prime (29928533) 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, 27016 + ... + 28101.

It is an arithmetic number, because the mean of its divisors is an integer number (5015738).

Almost surely, 2^29928531 is an apocalyptic number.

29928531 is a deficient number, since it is larger than the sum of its proper divisors (10197373).

29928531 is a wasteful number, since it uses less digits than its factorization.

29928531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55301.

The product of its digits is 38880, while the sum is 39.

The square root of 29928531 is about 5470.6974875239. The cubic root of 29928531 is about 310.4763090619.

The spelling of 29928531 in words is "twenty-nine million, nine hundred twenty-eight thousand, five hundred thirty-one".