2147405820 has 48 divisors (see below), whose sum is σ = 6871699968. Its totient is φ = 490835520.

The previous prime is 2147405801. The next prime is 2147405893. The reversal of 2147405820 is 285047412.

It is a super-2 number, since 2×2147405820² = 9222703511539744800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2556016 + ... + 2556855.

It is an arithmetic number, because the mean of its divisors is an integer number (143160416).

Almost surely, 2^2147405820 is an apocalyptic number.

2147405820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2147405820 is an abundant number, since it is smaller than the sum of its proper divisors (4724294148).

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

2147405820 is a wasteful number, since it uses less digits than its factorization.

2147405820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5112890 (or 5112888 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 2147405820 is about 46340.1102717721. The cubic root of 2147405820 is about 1290.1435691421.

The spelling of 2147405820 in words is "two billion, one hundred forty-seven million, four hundred five thousand, eight hundred twenty".