1381563770 has 64 divisors (see below), whose sum is σ = 2747416320. Its totient is φ = 498398208.

The previous prime is 1381563767. The next prime is 1381563791. The reversal of 1381563770 is 773651831.

It is a super-2 number, since 2×1381563770² = 3817436901153225800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 284402 + ... + 289218.

It is an arithmetic number, because the mean of its divisors is an integer number (42928380).

Almost surely, 2^1381563770 is an apocalyptic number.

1381563770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1381563770 is a deficient number, since it is larger than the sum of its proper divisors (1365852550).

1381563770 is a wasteful number, since it uses less digits than its factorization.

1381563770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4919.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 1381563770 is about 37169.3929194438. The cubic root of 1381563770 is about 1113.7566546310.

The spelling of 1381563770 in words is "one billion, three hundred eighty-one million, five hundred sixty-three thousand, seven hundred seventy".