1377802840 has 32 divisors (see below), whose sum is σ = 3158552880. Its totient is φ = 540721792.

The previous prime is 1377802819. The next prime is 1377802871. The reversal of 1377802840 is 482087731.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1377802793 and 1377802802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322834 + ... + 327073.

Almost surely, 2^1377802840 is an apocalyptic number.

1377802840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1377802840 is an abundant number, since it is smaller than the sum of its proper divisors (1780750040).

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

1377802840 is a wasteful number, since it uses less digits than its factorization.

1377802840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649971 (or 649967 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 1377802840 is about 37118.7666820976. The cubic root of 1377802840 is about 1112.7451034250.

The spelling of 1377802840 in words is "one billion, three hundred seventy-seven million, eight hundred two thousand, eight hundred forty".