61978852 has 24 divisors (see below), whose sum is σ = 117972792. Its totient is φ = 28320000.

The previous prime is 61978769. The next prime is 61978871. The reversal of 61978852 is 25887916.

It can be written as a sum of positive squares in 4 ways, for example, as 14561856 + 47416996 = 3816^2 + 6886^2 .

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, 649 + ... + 11152.

It is an arithmetic number, because the mean of its divisors is an integer number (4915533).

Almost surely, 2^61978852 is an apocalyptic number.

It is an amenable number.

61978852 is a deficient number, since it is larger than the sum of its proper divisors (55993940).

61978852 is a wasteful number, since it uses less digits than its factorization.

61978852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11919 (or 11917 counting only the distinct ones).

The product of its digits is 241920, while the sum is 46.

The square root of 61978852 is about 7872.6648601347. The cubic root of 61978852 is about 395.7441550485.

The spelling of 61978852 in words is "sixty-one million, nine hundred seventy-eight thousand, eight hundred fifty-two".