53781290 has 16 divisors (see below), whose sum is σ = 98133768. Its totient is φ = 21217536.

The previous prime is 53781289. The next prime is 53781307. The reversal of 53781290 is 9218735.

It can be written as a sum of positive squares in 4 ways, for example, as 51739249 + 2042041 = 7193^2 + 1429^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 53781290.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36107 + ... + 37566.

Almost surely, 2^53781290 is an apocalyptic number.

53781290 is a deficient number, since it is larger than the sum of its proper divisors (44352478).

53781290 is a wasteful number, since it uses less digits than its factorization.

53781290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73753.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 53781290 is about 7333.5727991205. The cubic root of 53781290 is about 377.4653331322.

The spelling of 53781290 in words is "fifty-three million, seven hundred eighty-one thousand, two hundred ninety".