3639920490 has 160 divisors (see below), whose sum is σ = 10698614784. Its totient is φ = 883975680.

The previous prime is 3639920489. The next prime is 3639920503. The reversal of 3639920490 is 940299363.

3639920490 is a `hidden beast` number, since 3 + 639 + 9 + 2 + 0 + 4 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 422607 + ... + 431133.

Almost surely, 2^3639920490 is an apocalyptic number.

3639920490 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3639920490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5349307392).

3639920490 is an abundant number, since it is smaller than the sum of its proper divisors (7058694294).

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

3639920490 is a wasteful number, since it uses less digits than its factorization.

3639920490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8594 (or 8585 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 45.

The square root of 3639920490 is about 60331.7535796864. The cubic root of 3639920490 is about 1538.2631357308.

The spelling of 3639920490 in words is "three billion, six hundred thirty-nine million, nine hundred twenty thousand, four hundred ninety".