53440642 has 8 divisors (see below), whose sum is σ = 81673596. Its totient is φ = 26216112.

The previous prime is 53440637. The next prime is 53440657. The reversal of 53440642 is 24604435.

It can be written as a sum of positive squares in 2 ways, for example, as 53158681 + 281961 = 7291^2 + 531^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 53440642.

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, 251973 + ... + 252184.

Almost surely, 2^53440642 is an apocalyptic number.

53440642 is a deficient number, since it is larger than the sum of its proper divisors (28232954).

53440642 is a wasteful number, since it uses less digits than its factorization.

53440642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504212.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 53440642 is about 7310.3106637133. The cubic root of 53440642 is about 376.6666957301. Note that the first 4 decimals are identical.

The spelling of 53440642 in words is "fifty-three million, four hundred forty thousand, six hundred forty-two".