53856378 has 24 divisors (see below), whose sum is σ = 116857728. Its totient is φ = 17926152.

The previous prime is 53856377. The next prime is 53856379. The reversal of 53856378 is 87365835.

53856378 is a `hidden beast` number, since 5 + 3 + 8 + 5 + 637 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (53856377) and next prime (53856379).

It is a super-6 number, since 6×53856378⁶ (a number of 48 digits) contains 666666 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (53856371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13801 + ... + 17267.

It is an arithmetic number, because the mean of its divisors is an integer number (4869072).

Almost surely, 2^53856378 is an apocalyptic number.

53856378 is an abundant number, since it is smaller than the sum of its proper divisors (63001350).

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

53856378 is a wasteful number, since it uses less digits than its factorization.

53856378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4338 (or 4335 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 53856378 is about 7338.6904826406. The cubic root of 53856378 is about 377.6409204447.

The spelling of 53856378 in words is "fifty-three million, eight hundred fifty-six thousand, three hundred seventy-eight".