55916340 has 48 divisors (see below), whose sum is σ = 160214208. Its totient is φ = 14563584.

The previous prime is 55916339. The next prime is 55916351. The reversal of 55916340 is 4361955.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8257 + ... + 13416.

It is an arithmetic number, because the mean of its divisors is an integer number (3337796).

Almost surely, 2^55916340 is an apocalyptic number.

It is an amenable number.

55916340 is an abundant number, since it is smaller than the sum of its proper divisors (104297868).

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

55916340 is a wasteful number, since it uses less digits than its factorization.

55916340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21728 (or 21726 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 55916340 is about 7477.7229154335. The cubic root of 55916340 is about 382.3956227652.

The spelling of 55916340 in words is "fifty-five million, nine hundred sixteen thousand, three hundred forty".