61467978 has 64 divisors (see below), whose sum is σ = 149151744. Its totient is φ = 16632000.

The previous prime is 61467977. The next prime is 61467997. The reversal of 61467978 is 87976416.

It is not an unprimeable number, because it can be changed into a prime (61467977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25443 + ... + 27753.

It is an arithmetic number, because the mean of its divisors is an integer number (2330496).

Almost surely, 2^61467978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61467978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74575872).

61467978 is an abundant number, since it is smaller than the sum of its proper divisors (87683766).

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

61467978 is a wasteful number, since it uses less digits than its factorization.

61467978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2371.

The product of its digits is 508032, while the sum is 48.

The square root of 61467978 is about 7840.1516566964. The cubic root of 61467978 is about 394.6538183604.

The spelling of 61467978 in words is "sixty-one million, four hundred sixty-seven thousand, nine hundred seventy-eight".