1380277440 has 84 divisors (see below), whose sum is σ = 4747589184. Its totient is φ = 368073216.

The previous prime is 1380277429. The next prime is 1380277453. The reversal of 1380277440 is 447720831.

It is a happy number.

1380277440 is a `hidden beast` number, since 1 + 380 + 277 + 4 + 4 + 0 = 666.

It is a super-2 number, since 2×1380277440² = 3810331622745907200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1380277395 and 1380277404.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 236752 + ... + 242511.

Almost surely, 2^1380277440 is an apocalyptic number.

1380277440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1380277440 is an abundant number, since it is smaller than the sum of its proper divisors (3367311744).

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

1380277440 is a wasteful number, since it uses less digits than its factorization.

1380277440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479286 (or 479273 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 1380277440 is about 37152.0852712200. The cubic root of 1380277440 is about 1113.4108861878.

The spelling of 1380277440 in words is "one billion, three hundred eighty million, two hundred seventy-seven thousand, four hundred forty".