53403978 has 16 divisors (see below), whose sum is σ = 107028000. Its totient is φ = 17764656.

The previous prime is 53403971. The next prime is 53403997. The reversal of 53403978 is 87930435.

53403978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (53403971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5925 + ... + 11912.

It is an arithmetic number, because the mean of its divisors is an integer number (6689250).

Almost surely, 2^53403978 is an apocalyptic number.

53403978 is an abundant number, since it is smaller than the sum of its proper divisors (53624022).

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

53403978 is a wasteful number, since it uses less digits than its factorization.

53403978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18341.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 53403978 is about 7307.8025424884. The cubic root of 53403978 is about 376.5805361666.

The spelling of 53403978 in words is "fifty-three million, four hundred three thousand, nine hundred seventy-eight".