53129394 has 24 divisors (see below), whose sum is σ = 115249212. Its totient is φ = 17688960.

The previous prime is 53129393. The next prime is 53129407. The reversal of 53129394 is 49392135.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 52751169 + 378225 = 7263^2 + 615^2 .

It is not an unprimeable number, because it can be changed into a prime (53129393) 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, 25662 + ... + 27654.

Almost surely, 2^53129394 is an apocalyptic number.

53129394 is an abundant number, since it is smaller than the sum of its proper divisors (62119818).

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

53129394 is a wasteful number, since it uses less digits than its factorization.

53129394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3482 (or 3479 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 53129394 is about 7288.9912882374. The cubic root of 53129394 is about 375.9340130542.

It can be divided in two parts, 5312 and 9394, that added together give a triangular number (14706 = T₁₇₁).

The spelling of 53129394 in words is "fifty-three million, one hundred twenty-nine thousand, three hundred ninety-four".