1381437984 has 48 divisors (see below), whose sum is σ = 3675968352. Its totient is φ = 454169088.

The previous prime is 1381437971. The next prime is 1381437989. The reversal of 1381437984 is 4897341831.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1381437989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91554 + ... + 105569.

It is an arithmetic number, because the mean of its divisors is an integer number (76582674).

Almost surely, 2^1381437984 is an apocalyptic number.

It is an amenable number.

1381437984 is an abundant number, since it is smaller than the sum of its proper divisors (2294530368).

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

1381437984 is a wasteful number, since it uses less digits than its factorization.

1381437984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197209 (or 197201 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 1381437984 is about 37167.7008167037. The cubic root of 1381437984 is about 1113.7228525367.

The spelling of 1381437984 in words is "one billion, three hundred eighty-one million, four hundred thirty-seven thousand, nine hundred eighty-four".