30661158 has 48 divisors (see below), whose sum is σ = 68085360. Its totient is φ = 9197760.

The previous prime is 30661157. The next prime is 30661159. The reversal of 30661158 is 85116603.

It is an interprime number because it is at equal distance from previous prime (30661157) and next prime (30661159).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30661151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113848 + ... + 114116.

It is an arithmetic number, because the mean of its divisors is an integer number (1418445).

Almost surely, 2^30661158 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30661158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34042680).

30661158 is an abundant number, since it is smaller than the sum of its proper divisors (37424202).

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

30661158 is a wasteful number, since it uses less digits than its factorization.

30661158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 30661158 is about 5537.2518454555. The cubic root of 30661158 is about 312.9893193864.

Subtracting 30661158 from its reverse (85116603), we obtain a palindrome (54455445).

It can be divided in two parts, 3066 and 1158, that added together give a palindrome (4224).

The spelling of 30661158 in words is "thirty million, six hundred sixty-one thousand, one hundred fifty-eight".