61820738 has 16 divisors (see below), whose sum is σ = 112212864. Its totient is φ = 24936000.

The previous prime is 61820723. The next prime is 61820749. The reversal of 61820738 is 83702816.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61820698 and 61820707.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129638 + ... + 130113.

It is an arithmetic number, because the mean of its divisors is an integer number (7013304).

Almost surely, 2^61820738 is an apocalyptic number.

61820738 is a deficient number, since it is larger than the sum of its proper divisors (50392126).

61820738 is a wasteful number, since it uses less digits than its factorization.

61820738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259777.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 61820738 is about 7862.6164856236. The cubic root of 61820738 is about 395.4073413640.

The spelling of 61820738 in words is "sixty-one million, eight hundred twenty thousand, seven hundred thirty-eight".