55148790 has 32 divisors (see below), whose sum is σ = 135438336. Its totient is φ = 14364000.

The previous prime is 55148789. The next prime is 55148791. The reversal of 55148790 is 9784155.

It is an interprime number because it is at equal distance from previous prime (55148789) and next prime (55148791).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55148791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20086 + ... + 22665.

It is an arithmetic number, because the mean of its divisors is an integer number (4232448).

Almost surely, 2^55148790 is an apocalyptic number.

55148790 is an abundant number, since it is smaller than the sum of its proper divisors (80289546).

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

55148790 is a wasteful number, since it uses less digits than its factorization.

55148790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42804.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 55148790 is about 7426.2231315791. The cubic root of 55148790 is about 380.6378714158.

The spelling of 55148790 in words is "fifty-five million, one hundred forty-eight thousand, seven hundred ninety".