30661152 has 24 divisors (see below), whose sum is σ = 80485776. Its totient is φ = 10220352.

The previous prime is 30661151. The next prime is 30661157. The reversal of 30661152 is 25116603.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

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 3 ways as a sum of consecutive naturals, for example, 159598 + ... + 159789.

It is an arithmetic number, because the mean of its divisors is an integer number (3353574).

Almost surely, 2^30661152 is an apocalyptic number.

30661152 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30661152 is an abundant number, since it is smaller than the sum of its proper divisors (49824624).

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

30661152 is a wasteful number, since it uses less digits than its factorization.

30661152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319400 (or 319392 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 30661152 is about 5537.2513036704. The cubic root of 30661152 is about 312.9892989703.

Adding to 30661152 its reverse (25116603), we get a palindrome (55777755).

The spelling of 30661152 in words is "thirty million, six hundred sixty-one thousand, one hundred fifty-two".