53408787 has 8 divisors (see below), whose sum is σ = 71526336. Its totient is φ = 35448552.

The previous prime is 53408777. The next prime is 53408821. The reversal of 53408787 is 78780435.

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

It is not a de Polignac number, because 53408787 - 2¹² = 53404691 is a prime.

It is a super-2 number, since 2×53408787² = 5704997057622738, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (53408717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38533 + ... + 39894.

It is an arithmetic number, because the mean of its divisors is an integer number (8940792).

Almost surely, 2^53408787 is an apocalyptic number.

53408787 is a deficient number, since it is larger than the sum of its proper divisors (18117549).

53408787 is a wasteful number, since it uses less digits than its factorization.

53408787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78657.

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 53408787 is about 7308.1315669602. The cubic root of 53408787 is about 376.5918394534.

The spelling of 53408787 in words is "fifty-three million, four hundred eight thousand, seven hundred eighty-seven".