29640340 has 24 divisors (see below), whose sum is σ = 64253952. Its totient is φ = 11473440.

The previous prime is 29640337. The next prime is 29640343. The reversal of 29640340 is 4304692.

It is an interprime number because it is at equal distance from previous prime (29640337) and next prime (29640343).

It is a junction number, because it is equal to n+sod(n) for n = 29640299 and 29640308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29640343) 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, 23284 + ... + 24523.

It is an arithmetic number, because the mean of its divisors is an integer number (2677248).

Almost surely, 2^29640340 is an apocalyptic number.

29640340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29640340 is an abundant number, since it is smaller than the sum of its proper divisors (34613612).

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

29640340 is a wasteful number, since it uses less digits than its factorization.

29640340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47847 (or 47845 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 29640340 is about 5444.2942609672. The cubic root of 29640340 is about 309.4765359342.

The spelling of 29640340 in words is "twenty-nine million, six hundred forty thousand, three hundred forty".