30669408 has 192 divisors, whose sum is σ = 111767040. Its totient is φ = 7948800.

The previous prime is 30669403. The next prime is 30669409. The reversal of 30669408 is 80496603.

It is a super-2 number, since 2×30669408² = 1881225174140928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30669403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66298 + ... + 66758.

It is an arithmetic number, because the mean of its divisors is an integer number (582120).

Almost surely, 2^30669408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30669408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55883520).

30669408 is an abundant number, since it is smaller than the sum of its proper divisors (81097632).

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

30669408 is a wasteful number, since it uses less digits than its factorization.

30669408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 30669408 is about 5537.9967497282. The cubic root of 30669408 is about 313.0173888885.

Adding to 30669408 its sum of digits (36), we get a square (30669444 = 5538²).

The spelling of 30669408 in words is "thirty million, six hundred sixty-nine thousand, four hundred eight".