3771998820 has 48 divisors (see below), whose sum is σ = 11735109120. Its totient is φ = 1005866208.

The previous prime is 3771998803. The next prime is 3771998821. The reversal of 3771998820 is 288991773.

3771998820 is a `hidden beast` number, since 377 + 199 + 8 + 82 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (3771998821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3492052 + ... + 3493131.

It is an arithmetic number, because the mean of its divisors is an integer number (244481440).

Almost surely, 2^3771998820 is an apocalyptic number.

3771998820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3771998820 is an abundant number, since it is smaller than the sum of its proper divisors (7963110300).

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

3771998820 is a wasteful number, since it uses less digits than its factorization.

3771998820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6985201 (or 6985193 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The square root of 3771998820 is about 61416.6005246139. The cubic root of 3771998820 is about 1556.6483515023.

The spelling of 3771998820 in words is "three billion, seven hundred seventy-one million, nine hundred ninety-eight thousand, eight hundred twenty".