29628021 has 8 divisors (see below), whose sum is σ = 39747040. Its totient is φ = 19630512.

The previous prime is 29628019. The next prime is 29628023. The reversal of 29628021 is 12082692.

It is an interprime number because it is at equal distance from previous prime (29628019) and next prime (29628023).

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

It is not a de Polignac number, because 29628021 - 2¹ = 29628019 is a prime.

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 29628021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29628023) 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, 29806 + ... + 30783.

It is an arithmetic number, because the mean of its divisors is an integer number (4968380).

Almost surely, 2^29628021 is an apocalyptic number.

It is an amenable number.

29628021 is a deficient number, since it is larger than the sum of its proper divisors (10119019).

29628021 is a wasteful number, since it uses less digits than its factorization.

29628021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60755.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 29628021 is about 5443.1627754459. The cubic root of 29628021 is about 309.4336555248.

The spelling of 29628021 in words is "twenty-nine million, six hundred twenty-eight thousand, twenty-one".