1378820976 has 120 divisors (see below), whose sum is σ = 3982173696. Its totient is φ = 410492160.

The previous prime is 1378820941. The next prime is 1378820977. The reversal of 1378820976 is 6790288731.

It is a super-2 number, since 2×1378820976² = 3802294567715185152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378820977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 248731 + ... + 254213.

Almost surely, 2^1378820976 is an apocalyptic number.

1378820976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1378820976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1991086848).

1378820976 is an abundant number, since it is smaller than the sum of its proper divisors (2603352720).

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

1378820976 is a wasteful number, since it uses less digits than its factorization.

1378820976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5551 (or 5532 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 51.

The square root of 1378820976 is about 37132.4787214643. The cubic root of 1378820976 is about 1113.0191259168.

The spelling of 1378820976 in words is "one billion, three hundred seventy-eight million, eight hundred twenty thousand, nine hundred seventy-six".