30961500 has 48 divisors (see below), whose sum is σ = 90164256. Its totient is φ = 8256000.

The previous prime is 30961433. The next prime is 30961501. The reversal of 30961500 is 516903.

It is a super-2 number, since 2×30961500² = 1917228964500000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30961501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8821 + ... + 11820.

It is an arithmetic number, because the mean of its divisors is an integer number (1878422).

Almost surely, 2^30961500 is an apocalyptic number.

30961500 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30961500 is an abundant number, since it is smaller than the sum of its proper divisors (59202756).

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

30961500 is a wasteful number, since it uses less digits than its factorization.

30961500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20663 (or 20651 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 30961500 is about 5564.3058866313. The cubic root of 30961500 is about 314.0079649622.

The spelling of 30961500 in words is "thirty million, nine hundred sixty-one thousand, five hundred".