1381487616 has 176 divisors, whose sum is σ = 4234833600. Its totient is φ = 444358656.

The previous prime is 1381487599. The next prime is 1381487623. The reversal of 1381487616 is 6167841831.

1381487616 is a `hidden beast` number, since 13 + 8 + 14 + 8 + 7 + 616 = 666.

It is a super-2 number, since 2×1381487616² = 3817016066322726912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 800931 + ... + 802653.

Almost surely, 2^1381487616 is an apocalyptic number.

1381487616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1381487616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2117416800).

1381487616 is an abundant number, since it is smaller than the sum of its proper divisors (2853345984).

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

1381487616 is a wasteful number, since it uses less digits than its factorization.

1381487616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781 (or 1757 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 1381487616 is about 37168.3684871962. The cubic root of 1381487616 is about 1113.7361902402.

The spelling of 1381487616 in words is "one billion, three hundred eighty-one million, four hundred eighty-seven thousand, six hundred sixteen".