30851996 has 24 divisors (see below), whose sum is σ = 61981920. Its totient is φ = 13162752.

The previous prime is 30851987. The next prime is 30851999. The reversal of 30851996 is 69915803.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30851999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4160 + ... + 8888.

It is an arithmetic number, because the mean of its divisors is an integer number (2582580).

Almost surely, 2^30851996 is an apocalyptic number.

It is an amenable number.

30851996 is an abundant number, since it is smaller than the sum of its proper divisors (31129924).

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

30851996 is a wasteful number, since it uses less digits than its factorization.

30851996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4973 (or 4971 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 30851996 is about 5554.4573092247. The cubic root of 30851996 is about 313.6373353569.

The spelling of 30851996 in words is "thirty million, eight hundred fifty-one thousand, nine hundred ninety-six".