30996940 has 48 divisors (see below), whose sum is σ = 72535680. Its totient is φ = 11047680.

The previous prime is 30996919. The next prime is 30996941. The reversal of 30996940 is 4969903.

It is a junction number, because it is equal to n+sod(n) for n = 30996893 and 30996902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30996941) 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, 5485 + ... + 9595.

It is an arithmetic number, because the mean of its divisors is an integer number (1511160).

Almost surely, 2^30996940 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 30996940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36267840).

30996940 is an abundant number, since it is smaller than the sum of its proper divisors (41538740).

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

30996940 is a wasteful number, since it uses less digits than its factorization.

30996940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4162 (or 4160 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 30996940 is about 5567.4895599363. The cubic root of 30996940 is about 314.1277287433.

The spelling of 30996940 in words is "thirty million, nine hundred ninety-six thousand, nine hundred forty".