61538260 has 24 divisors (see below), whose sum is σ = 147692160. Its totient is φ = 21098784.

The previous prime is 61538237. The next prime is 61538263. The reversal of 61538260 is 6283516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61538263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219640 + ... + 219919.

It is an arithmetic number, because the mean of its divisors is an integer number (6153840).

Almost surely, 2^61538260 is an apocalyptic number.

It is an amenable number.

61538260 is an abundant number, since it is smaller than the sum of its proper divisors (86153900).

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

61538260 is a wasteful number, since it uses less digits than its factorization.

61538260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439575 (or 439573 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 61538260 is about 7844.6325599100. The cubic root of 61538260 is about 394.8041757542.

The spelling of 61538260 in words is "sixty-one million, five hundred thirty-eight thousand, two hundred sixty".