1381979504 has 90 divisors (see below), whose sum is σ = 2948518872. Its totient is φ = 627340800.

The previous prime is 1381979503. The next prime is 1381979509. The reversal of 1381979504 is 4059791831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381979503) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4443509 + ... + 4443819.

Almost surely, 2^1381979504 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 1381979504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1474259436).

1381979504 is an abundant number, since it is smaller than the sum of its proper divisors (1566539368).

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

1381979504 is a wasteful number, since it uses less digits than its factorization.

1381979504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 1381979504 is about 37174.9849226600. The cubic root of 1381979504 is about 1113.8683589868.

The spelling of 1381979504 in words is "one billion, three hundred eighty-one million, nine hundred seventy-nine thousand, five hundred four".