1994536320 has 128 divisors (see below), whose sum is σ = 7265859840. Its totient is φ = 455890944.

The previous prime is 1994536303. The next prime is 1994536363. The reversal of 1994536320 is 236354991.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60762 + ... + 87641.

It is an arithmetic number, because the mean of its divisors is an integer number (56764530).

Almost surely, 2^1994536320 is an apocalyptic number.

1994536320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1994536320 is an abundant number, since it is smaller than the sum of its proper divisors (5271323520).

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

1994536320 is a wasteful number, since it uses less digits than its factorization.

1994536320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148432 (or 148420 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 1994536320 is about 44660.2319743192. The cubic root of 1994536320 is about 1258.7727026519.

It can be divided in two parts, 19945 and 36320, that added together give a palindrome (56265).

The spelling of 1994536320 in words is "one billion, nine hundred ninety-four million, five hundred thirty-six thousand, three hundred twenty".