53990388 has 60 divisors (see below), whose sum is σ = 143190432. Its totient is φ = 17735760.

The previous prime is 53990371. The next prime is 53990389. The reversal of 53990388 is 88309935.

53990388 = T₂₀₇ + T₂₀₈ + ... + T₆₉₂.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53990389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21831 + ... + 24177.

Almost surely, 2^53990388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53990388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71595216).

53990388 is an abundant number, since it is smaller than the sum of its proper divisors (89200044).

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

53990388 is a wasteful number, since it uses less digits than its factorization.

53990388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434 (or 2423 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 53990388 is about 7347.8151854820. The cubic root of 53990388 is about 377.9538870430.

The spelling of 53990388 in words is "fifty-three million, nine hundred ninety thousand, three hundred eighty-eight".