53431290 has 96 divisors (see below), whose sum is σ = 156529152. Its totient is φ = 12528000.

The previous prime is 53431247. The next prime is 53431297. The reversal of 53431290 is 9213435.

53431290 is a `hidden beast` number, since 534 + 3 + 129 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (53431297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29820 + ... + 31560.

It is an arithmetic number, because the mean of its divisors is an integer number (1630512).

Almost surely, 2^53431290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53431290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78264576).

53431290 is an abundant number, since it is smaller than the sum of its proper divisors (103097862).

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

53431290 is a wasteful number, since it uses less digits than its factorization.

53431290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796 (or 1793 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 53431290 is about 7309.6709912280. The cubic root of 53431290 is about 376.6447224883.

The spelling of 53431290 in words is "fifty-three million, four hundred thirty-one thousand, two hundred ninety".