61378120 has 16 divisors (see below), whose sum is σ = 138100860. Its totient is φ = 24551232.

The previous prime is 61378117. The next prime is 61378133. The reversal of 61378120 is 2187316.

It can be written as a sum of positive squares in 2 ways, for example, as 57851236 + 3526884 = 7606^2 + 1878^2 .

It is a super-2 number, since 2×61378120² = 7534547229468800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767187 + ... + 767266.

Almost surely, 2^61378120 is an apocalyptic number.

It is an amenable number.

61378120 is an abundant number, since it is smaller than the sum of its proper divisors (76722740).

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

61378120 is a wasteful number, since it uses less digits than its factorization.

61378120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534464 (or 1534460 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 61378120 is about 7834.4189318673. The cubic root of 61378120 is about 394.4614141274.

The spelling of 61378120 in words is "sixty-one million, three hundred seventy-eight thousand, one hundred twenty".