3619402020 has 216 divisors, whose sum is σ = 12169213056. Its totient is φ = 869895936.

The previous prime is 3619401971. The next prime is 3619402099. The reversal of 3619402020 is 202049163.

3619402020 is a `hidden beast` number, since 3 + 619 + 4 + 0 + 20 + 20 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1306677 + ... + 1309443.

Almost surely, 2^3619402020 is an apocalyptic number.

3619402020 is a gapful number since it is divisible by the number (30) 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 3619402020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6084606528).

3619402020 is an abundant number, since it is smaller than the sum of its proper divisors (8549811036).

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

3619402020 is a wasteful number, since it uses less digits than its factorization.

3619402020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2851 (or 2833 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 3619402020 is about 60161.4662387811. The cubic root of 3619402020 is about 1535.3672574898.

The spelling of 3619402020 in words is "three billion, six hundred nineteen million, four hundred two thousand, twenty".