61386280 has 16 divisors (see below), whose sum is σ = 138119220. Its totient is φ = 24554496.

The previous prime is 61386263. The next prime is 61386323. The reversal of 61386280 is 8268316.

It can be written as a sum of positive squares in 2 ways, for example, as 59691076 + 1695204 = 7726^2 + 1302^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767289 + ... + 767368.

Almost surely, 2^61386280 is an apocalyptic number.

It is an amenable number.

61386280 is an abundant number, since it is smaller than the sum of its proper divisors (76732940).

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

61386280 is a wasteful number, since it uses less digits than its factorization.

61386280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534668 (or 1534664 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 61386280 is about 7834.9396934501. The cubic root of 61386280 is about 394.4788940942.

The spelling of 61386280 in words is "sixty-one million, three hundred eighty-six thousand, two hundred eighty".