55724087 has 8 divisors (see below), whose sum is σ = 57125376. Its totient is φ = 54327672.

The previous prime is 55724083. The next prime is 55724107. The reversal of 55724087 is 78042755.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55724087 - 2² = 55724083 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55724087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55724083) 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, 34778 + ... + 36344.

It is an arithmetic number, because the mean of its divisors is an integer number (7140672).

Almost surely, 2^55724087 is an apocalyptic number.

55724087 is a deficient number, since it is larger than the sum of its proper divisors (1401289).

55724087 is a wasteful number, since it uses less digits than its factorization.

55724087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2437.

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 55724087 is about 7464.8567970189. The cubic root of 55724087 is about 381.9568653725.

The spelling of 55724087 in words is "fifty-five million, seven hundred twenty-four thousand, eighty-seven".