1381022464 has 36 divisors (see below), whose sum is σ = 2782468584. Its totient is φ = 684044288.

The previous prime is 1381022459. The next prime is 1381022477. The reversal of 1381022464 is 4642201831.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2184 + ... + 52600.

It is an arithmetic number, because the mean of its divisors is an integer number (77290794).

Almost surely, 2^1381022464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1381022464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1391234292).

1381022464 is an abundant number, since it is smaller than the sum of its proper divisors (1401446120).

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

1381022464 is an equidigital number, since it uses as much as digits as its factorization.

1381022464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50540 (or 50526 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 1381022464 is about 37162.1105966817. The cubic root of 1381022464 is about 1113.6111765074.

The spelling of 1381022464 in words is "one billion, three hundred eighty-one million, twenty-two thousand, four hundred sixty-four".