61147904 has 18 divisors (see below), whose sum is σ = 122057460. Its totient is φ = 30573824.

The previous prime is 61147901. The next prime is 61147913. The reversal of 61147904 is 40974116.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (61147901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119174 + ... + 119685.

It is an arithmetic number, because the mean of its divisors is an integer number (6780970).

Almost surely, 2^61147904 is an apocalyptic number.

61147904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

61147904 is a deficient number, since it is larger than the sum of its proper divisors (60909556).

61147904 is an equidigital number, since it uses as much as digits as its factorization.

61147904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238875 (or 238861 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 61147904 is about 7819.7125266854. The cubic root of 61147904 is about 393.9676165333.

The spelling of 61147904 in words is "sixty-one million, one hundred forty-seven thousand, nine hundred four".