1396730880 has 264 divisors, whose sum is σ = 5127194592. Its totient is φ = 350355456.

The previous prime is 1396730861. The next prime is 1396730891. The reversal of 1396730880 is 880376931.

It is a happy number.

It is a super-2 number, since 2×1396730880² = 3901714302291148800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 782469 + ... + 784251.

Almost surely, 2^1396730880 is an apocalyptic number.

1396730880 is a gapful number since it is divisible by the number (10) 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 1396730880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2563597296).

1396730880 is an abundant number, since it is smaller than the sum of its proper divisors (3730463712).

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

1396730880 is a wasteful number, since it uses less digits than its factorization.

1396730880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831 (or 1810 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 1396730880 is about 37372.8628820432. The cubic root of 1396730880 is about 1117.8175185904.

The spelling of 1396730880 in words is "one billion, three hundred ninety-six million, seven hundred thirty thousand, eight hundred eighty".