55390837 has 8 divisors (see below), whose sum is σ = 56856800. Its totient is φ = 53933040.

The previous prime is 55390817. The next prime is 55390849. The reversal of 55390837 is 73809355.

It is a happy number.

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 55390837 - 2¹⁹ = 54866549 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 55390837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55390817) 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, 13162 + ... + 16852.

It is an arithmetic number, because the mean of its divisors is an integer number (7107100).

Almost surely, 2^55390837 is an apocalyptic number.

It is an amenable number.

55390837 is a deficient number, since it is larger than the sum of its proper divisors (1465963).

55390837 is a wasteful number, since it uses less digits than its factorization.

55390837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4083.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 55390837 is about 7442.5020658378. The cubic root of 55390837 is about 381.1939295128.

The spelling of 55390837 in words is "fifty-five million, three hundred ninety thousand, eight hundred thirty-seven".