53443390 has 128 divisors (see below), whose sum is σ = 136442880. Its totient is φ = 14515200.

The previous prime is 53443363. The next prime is 53443391. The reversal of 53443390 is 9334435.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53443391) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 190050 + ... + 190330.

It is an arithmetic number, because the mean of its divisors is an integer number (1065960).

Almost surely, 2^53443390 is an apocalyptic number.

53443390 is an abundant number, since it is smaller than the sum of its proper divisors (82999490).

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

53443390 is a wasteful number, since it uses less digits than its factorization.

53443390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338.

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 53443390 is about 7310.4986150057. The cubic root of 53443390 is about 376.6731518797.

The spelling of 53443390 in words is "fifty-three million, four hundred forty-three thousand, three hundred ninety".