53939766 has 16 divisors (see below), whose sum is σ = 108119088. Its totient is φ = 17940000.

The previous prime is 53939741. The next prime is 53939771. The reversal of 53939766 is 66793935.

It is a happy number.

It is a super-2 number, since 2×53939766² = 5818996712269512, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6985 + ... + 12516.

It is an arithmetic number, because the mean of its divisors is an integer number (6757443).

Almost surely, 2^53939766 is an apocalyptic number.

53939766 is an abundant number, since it is smaller than the sum of its proper divisors (54179322).

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

53939766 is a wasteful number, since it uses less digits than its factorization.

53939766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19967.

The product of its digits is 918540, while the sum is 48.

The square root of 53939766 is about 7344.3696802381. The cubic root of 53939766 is about 377.8357254887.

The spelling of 53939766 in words is "fifty-three million, nine hundred thirty-nine thousand, seven hundred sixty-six".