29781996 has 12 divisors (see below), whose sum is σ = 69491352. Its totient is φ = 9927328.

The previous prime is 29781989. The next prime is 29782013. The reversal of 29781996 is 69918792.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1240905 + ... + 1240928.

It is an arithmetic number, because the mean of its divisors is an integer number (5790946).

Almost surely, 2^29781996 is an apocalyptic number.

It is an amenable number.

29781996 is an abundant number, since it is smaller than the sum of its proper divisors (39709356).

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

29781996 is a wasteful number, since it uses less digits than its factorization.

29781996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2481840 (or 2481838 counting only the distinct ones).

The product of its digits is 489888, while the sum is 51.

The square root of 29781996 is about 5457.2883376270. The cubic root of 29781996 is about 309.9687654968.

The spelling of 29781996 in words is "twenty-nine million, seven hundred eighty-one thousand, nine hundred ninety-six".