3621487381 has 24 divisors (see below), whose sum is σ = 3920361984. Its totient is φ = 3343364640.

The previous prime is 3621487327. The next prime is 3621487399. The reversal of 3621487381 is 1837841263.

It is a de Polignac number, because none of the positive numbers 2^k-3621487381 is a prime.

It is a super-2 number, since 2×3621487381² = 26230341701484478322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621487481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7821556 + ... + 7822018.

It is an arithmetic number, because the mean of its divisors is an integer number (163348416).

Almost surely, 2^3621487381 is an apocalyptic number.

It is an amenable number.

3621487381 is a deficient number, since it is larger than the sum of its proper divisors (298874603).

3621487381 is a wasteful number, since it uses less digits than its factorization.

3621487381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009 (or 990 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 3621487381 is about 60178.7951109026. The cubic root of 3621487381 is about 1535.6620741715.

The spelling of 3621487381 in words is "three billion, six hundred twenty-one million, four hundred eighty-seven thousand, three hundred eighty-one".