55729340 has 24 divisors (see below), whose sum is σ = 118072080. Its totient is φ = 22093568.

The previous prime is 55729321. The next prime is 55729361. The reversal of 55729340 is 4392755.

It is a self number, because there is not a number n which added to its sum of digits gives 55729340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10070 + ... + 14589.

It is an arithmetic number, because the mean of its divisors is an integer number (4919670).

Almost surely, 2^55729340 is an apocalyptic number.

It is an amenable number.

55729340 is an abundant number, since it is smaller than the sum of its proper divisors (62342740).

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

55729340 is a wasteful number, since it uses less digits than its factorization.

55729340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24781 (or 24779 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 55729340 is about 7465.2086374059. The cubic root of 55729340 is about 381.9688671027.

The spelling of 55729340 in words is "fifty-five million, seven hundred twenty-nine thousand, three hundred forty".