61740138 has 16 divisors (see below), whose sum is σ = 123963840. Its totient is φ = 20499456.

The previous prime is 61740097. The next prime is 61740167. The reversal of 61740138 is 83104716.

It is a happy number.

61740138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18478 + ... + 21561.

It is an arithmetic number, because the mean of its divisors is an integer number (7747740).

Almost surely, 2^61740138 is an apocalyptic number.

61740138 is an abundant number, since it is smaller than the sum of its proper divisors (62223702).

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

61740138 is a wasteful number, since it uses less digits than its factorization.

61740138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40301.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 61740138 is about 7857.4892936612. The cubic root of 61740138 is about 395.2354266037.

It can be divided in two parts, 617 and 40138, that added together give a triangular number (40755 = T₂₈₅).

The spelling of 61740138 in words is "sixty-one million, seven hundred forty thousand, one hundred thirty-eight".