1985451332 has 24 divisors (see below), whose sum is σ = 3490021080. Its totient is φ = 988313600.

The previous prime is 1985451319. The next prime is 1985451337. The reversal of 1985451332 is 2331545891.

It can be written as a sum of positive squares in 4 ways, for example, as 658743556 + 1326707776 = 25666^2 + 36424^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1985451332.

It is not an unprimeable number, because it can be changed into a prime (1985451337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1239332 + ... + 1240932.

It is an arithmetic number, because the mean of its divisors is an integer number (145417545).

Almost surely, 2^1985451332 is an apocalyptic number.

It is an amenable number.

1985451332 is a deficient number, since it is larger than the sum of its proper divisors (1504569748).

1985451332 is a wasteful number, since it uses less digits than its factorization.

1985451332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791 (or 2789 counting only the distinct ones).

The product of its digits is 129600, while the sum is 41.

The square root of 1985451332 is about 44558.4036069516. The cubic root of 1985451332 is about 1256.8585832017.

The spelling of 1985451332 in words is "one billion, nine hundred eighty-five million, four hundred fifty-one thousand, three hundred thirty-two".