3631920489 has 6 divisors (see below), whose sum is σ = 5246107386. Its totient is φ = 2421280320.

The previous prime is 3631920437. The next prime is 3631920493. The reversal of 3631920489 is 9840291363.

It is a happy number.

3631920489 is a `hidden beast` number, since 3 + 631 + 9 + 2 + 0 + 4 + 8 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2084835600 + 1547084889 = 45660^2 + 39333^2 .

It is not a de Polignac number, because 3631920489 - 2⁷ = 3631920361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3631920689) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 201773352 + ... + 201773369.

It is an arithmetic number, because the mean of its divisors is an integer number (874351231).

Almost surely, 2^3631920489 is an apocalyptic number.

It is an amenable number.

3631920489 is a deficient number, since it is larger than the sum of its proper divisors (1614186897).

3631920489 is a wasteful number, since it uses less digits than its factorization.

3631920489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403546727 (or 403546724 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 3631920489 is about 60265.4170233642. The cubic root of 3631920489 is about 1537.1353516355.

It can be divided in two parts, 3631 and 920489, that added together give a triangular number (924120 = T₁₃₅₉).

The spelling of 3631920489 in words is "three billion, six hundred thirty-one million, nine hundred twenty thousand, four hundred eighty-nine".