53690644 has 12 divisors (see below), whose sum is σ = 107381344. Its totient is φ = 23010264.

The previous prime is 53690627. The next prime is 53690753. The reversal of 53690644 is 44609635.

It is a happy number.

53690644 is an admirable number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 958734 + ... + 958789.

Almost surely, 2^53690644 is an apocalyptic number.

It is an amenable number.

53690644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

53690644 is a wasteful number, since it uses less digits than its factorization.

53690644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917534 (or 1917532 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 53690644 is about 7327.3899855269. The cubic root of 53690644 is about 377.2531468022.

The spelling of 53690644 in words is "fifty-three million, six hundred ninety thousand, six hundred forty-four".