1376245840 has 20 divisors (see below), whose sum is σ = 3199771764. Its totient is φ = 550498304.

The previous prime is 1376245813. The next prime is 1376245841. The reversal of 1376245840 is 485426731.

It can be written as a sum of positive squares in 2 ways, for example, as 150405696 + 1225840144 = 12264^2 + 35012^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1376245840² = 3788105224234611200, which contains 22 as substring.

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 = 1376245793 and 1376245802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1376245841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8601457 + ... + 8601616.

Almost surely, 2^1376245840 is an apocalyptic number.

1376245840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1376245840 is an abundant number, since it is smaller than the sum of its proper divisors (1823525924).

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

1376245840 is a wasteful number, since it uses less digits than its factorization.

1376245840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17203086 (or 17203080 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 1376245840 is about 37097.7875351078. The cubic root of 1376245840 is about 1112.3257891584.

The spelling of 1376245840 in words is "one billion, three hundred seventy-six million, two hundred forty-five thousand, eight hundred forty".