1396567980 has 120 divisors (see below), whose sum is σ = 4522573440. Its totient is φ = 360391680.

The previous prime is 1396567979. The next prime is 1396567987. The reversal of 1396567980 is 897656931.

It is a super-2 number, since 2×1396567980² = 3900804245522560800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1396567987) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 36316 + ... + 64124.

It is an arithmetic number, because the mean of its divisors is an integer number (37688112).

Almost surely, 2^1396567980 is an apocalyptic number.

1396567980 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 1396567980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2261286720).

1396567980 is an abundant number, since it is smaller than the sum of its proper divisors (3126005460).

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

1396567980 is a wasteful number, since it uses less digits than its factorization.

1396567980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27861 (or 27850 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The square root of 1396567980 is about 37370.6834296618. The cubic root of 1396567980 is about 1117.7740600745.

The spelling of 1396567980 in words is "one billion, three hundred ninety-six million, five hundred sixty-seven thousand, nine hundred eighty".