53978402 has 8 divisors (see below), whose sum is σ = 81085212. Its totient is φ = 26950000.

The previous prime is 53978399. The next prime is 53978413. The reversal of 53978402 is 20487935.

53978402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 47872561 + 6105841 = 6919^2 + 2471^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 17849 + ... + 20652.

Almost surely, 2^53978402 is an apocalyptic number.

53978402 is a deficient number, since it is larger than the sum of its proper divisors (27106810).

53978402 is a wasteful number, since it uses less digits than its factorization.

53978402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39204.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 53978402 is about 7346.9995236151. Note that the first 3 decimals coincide. The cubic root of 53978402 is about 377.9259160730.

The spelling of 53978402 in words is "fifty-three million, nine hundred seventy-eight thousand, four hundred two".