30996870 has 64 divisors (see below), whose sum is σ = 78382080. Its totient is φ = 7829888.

The previous prime is 30996863. The next prime is 30996871. The reversal of 30996870 is 7869903.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30996871) 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, 115096 + ... + 115364.

It is an arithmetic number, because the mean of its divisors is an integer number (1224720).

Almost surely, 2^30996870 is an apocalyptic number.

30996870 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30996870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39191040).

30996870 is an abundant number, since it is smaller than the sum of its proper divisors (47385210).

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

30996870 is a wasteful number, since it uses less digits than its factorization.

30996870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 30996870 is about 5567.4832734369. The cubic root of 30996870 is about 314.1274922796.

It can be divided in two parts, 309 and 96870, that added together give a palindrome (97179).

The spelling of 30996870 in words is "thirty million, nine hundred ninety-six thousand, eight hundred seventy".