61538272 has 24 divisors (see below), whose sum is σ = 121418136. Its totient is φ = 30701952.

The previous prime is 61538263. The next prime is 61538273. The reversal of 61538272 is 27283516.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61538273) 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 3 ways as a sum of consecutive naturals, for example, 14898 + ... + 18574.

It is an arithmetic number, because the mean of its divisors is an integer number (5059089).

Almost surely, 2^61538272 is an apocalyptic number.

It is an amenable number.

61538272 is a deficient number, since it is larger than the sum of its proper divisors (59879864).

61538272 is a wasteful number, since it uses less digits than its factorization.

61538272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4210 (or 4202 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 61538272 is about 7844.6333247641. The cubic root of 61538272 is about 394.8042014166.

The spelling of 61538272 in words is "sixty-one million, five hundred thirty-eight thousand, two hundred seventy-two".