3999223620 has 72 divisors (see below), whose sum is σ = 13863979584. Its totient is φ = 914107968.

The previous prime is 3999223619. The next prime is 3999223621. The reversal of 3999223620 is 263229993.

3999223620 is a `hidden beast` number, since 399 + 9 + 2 + 236 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (3999223619) and next prime (3999223621).

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

It is not an unprimeable number, because it can be changed into a prime (3999223621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1585734 + ... + 1588253.

It is an arithmetic number, because the mean of its divisors is an integer number (192555272).

Almost surely, 2^3999223620 is an apocalyptic number.

3999223620 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3999223620 is an abundant number, since it is smaller than the sum of its proper divisors (9864755964).

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

3999223620 is a wasteful number, since it uses less digits than its factorization.

3999223620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174009 (or 3174004 counting only the distinct ones).

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

The square root of 3999223620 is about 63239.4150826840. The cubic root of 3999223620 is about 1587.2983431204.

The spelling of 3999223620 in words is "three billion, nine hundred ninety-nine million, two hundred twenty-three thousand, six hundred twenty".