29957039540 has 96 divisors (see below), whose sum is σ = 67157766144. Its totient is φ = 11198549120.

The previous prime is 29957039537. The next prime is 29957039543. The reversal of 29957039540 is 4593075992.

It is an interprime number because it is at equal distance from previous prime (29957039537) and next prime (29957039543).

It is a super-2 number, since 2×29957039540² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29957039543) 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, 20992307 + ... + 20993733.

It is an arithmetic number, because the mean of its divisors is an integer number (699560064).

Almost surely, 2^29957039540 is an apocalyptic number.

29957039540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29957039540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33578883072).

29957039540 is an abundant number, since it is smaller than the sum of its proper divisors (37200726604).

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

29957039540 is a wasteful number, since it uses less digits than its factorization.

29957039540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2477 (or 2475 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 53.

The spelling of 29957039540 in words is "twenty-nine billion, nine hundred fifty-seven million, thirty-nine thousand, five hundred forty".