61457838 has 32 divisors (see below), whose sum is σ = 132720000. Its totient is φ = 18860256.

The previous prime is 61457831. The next prime is 61457849. The reversal of 61457838 is 83875416.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61457838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61457831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38133 + ... + 39711.

It is an arithmetic number, because the mean of its divisors is an integer number (4147500).

Almost surely, 2^61457838 is an apocalyptic number.

61457838 is an abundant number, since it is smaller than the sum of its proper divisors (71262162).

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

61457838 is a wasteful number, since it uses less digits than its factorization.

61457838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096.

The product of its digits is 161280, while the sum is 42.

The square root of 61457838 is about 7839.5049588606. The cubic root of 61457838 is about 394.6321159504.

The spelling of 61457838 in words is "sixty-one million, four hundred fifty-seven thousand, eight hundred thirty-eight".