53919890 has 8 divisors (see below), whose sum is σ = 97055820. Its totient is φ = 21567952.

The previous prime is 53919883. The next prime is 53919919. The reversal of 53919890 is 9891935.

It can be written as a sum of positive squares in 2 ways, for example, as 49378729 + 4541161 = 7027^2 + 2131^2 .

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

It is a super-2 number, since 2×53919890² = 5814709075224200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2695985 + ... + 2696004.

Almost surely, 2^53919890 is an apocalyptic number.

53919890 is a deficient number, since it is larger than the sum of its proper divisors (43135930).

53919890 is a wasteful number, since it uses less digits than its factorization.

53919890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5391996.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 53919890 is about 7343.0164101682. The cubic root of 53919890 is about 377.7893108423.

The spelling of 53919890 in words is "fifty-three million, nine hundred nineteen thousand, eight hundred ninety".