1381925040 has 80 divisors (see below), whose sum is σ = 4342707168. Its totient is φ = 363460608.

The previous prime is 1381925033. The next prime is 1381925047. The reversal of 1381925040 is 405291831.

It is an interprime number because it is at equal distance from previous prime (1381925033) and next prime (1381925047).

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1381924992 and 1381925010.

It is not an unprimeable number, because it can be changed into a prime (1381925047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21919 + ... + 56958.

Almost surely, 2^1381925040 is an apocalyptic number.

1381925040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1381925040 is an abundant number, since it is smaller than the sum of its proper divisors (2960782128).

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

1381925040 is a wasteful number, since it uses less digits than its factorization.

1381925040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78966 (or 78960 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1381925040 is about 37174.2523798395. The cubic root of 1381925040 is about 1113.8537262268.

The spelling of 1381925040 in words is "one billion, three hundred eighty-one million, nine hundred twenty-five thousand, forty".