29754978140 has 12 divisors (see below), whose sum is σ = 62485454136. Its totient is φ = 11901991248.

The previous prime is 29754978119. The next prime is 29754978203. The reversal of 29754978140 is 4187945792.

It is a happy number.

It is a super-2 number, since 2×29754978140² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 743874434 + ... + 743874473.

It is an arithmetic number, because the mean of its divisors is an integer number (5207121178).

Almost surely, 2^29754978140 is an apocalyptic number.

29754978140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29754978140 is an abundant number, since it is smaller than the sum of its proper divisors (32730475996).

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

29754978140 is a wasteful number, since it uses less digits than its factorization.

29754978140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487748916 (or 1487748914 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 29754978140 in words is "twenty-nine billion, seven hundred fifty-four million, nine hundred seventy-eight thousand, one hundred forty".