55726390 has 8 divisors (see below), whose sum is σ = 100307520. Its totient is φ = 22290552.

The previous prime is 55726369. The next prime is 55726393. The reversal of 55726390 is 9362755.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55726393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2786310 + ... + 2786329.

It is an arithmetic number, because the mean of its divisors is an integer number (12538440).

Almost surely, 2^55726390 is an apocalyptic number.

55726390 is a deficient number, since it is larger than the sum of its proper divisors (44581130).

55726390 is a wasteful number, since it uses less digits than its factorization.

55726390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5572646.

The product of its (nonzero) digits is 56700, while the sum is 37.

The square root of 55726390 is about 7465.0110515658. The cubic root of 55726390 is about 381.9621272176.

Subtracting from 55726390 its reverse (9362755), we obtain a triangular number (46363635 = T₉₆₂₉).

The spelling of 55726390 in words is "fifty-five million, seven hundred twenty-six thousand, three hundred ninety".