53433638 has 4 divisors (see below), whose sum is σ = 80150460. Its totient is φ = 26716818.

The previous prime is 53433617. The next prime is 53433647. The reversal of 53433638 is 83633435.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83633435 = 5 ⋅16726687.

It is a junction number, because it is equal to n+sod(n) for n = 53433598 and 53433607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13358408 + ... + 13358411.

It is an arithmetic number, because the mean of its divisors is an integer number (20037615).

Almost surely, 2^53433638 is an apocalyptic number.

53433638 is a deficient number, since it is larger than the sum of its proper divisors (26716822).

53433638 is a wasteful number, since it uses less digits than its factorization.

53433638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26716821.

The product of its digits is 77760, while the sum is 35.

The square root of 53433638 is about 7309.8315986075. The cubic root of 53433638 is about 376.6502395356.

The spelling of 53433638 in words is "fifty-three million, four hundred thirty-three thousand, six hundred thirty-eight".