1828821537 has 16 divisors (see below), whose sum is σ = 2711290560. Its totient is φ = 1218348000.

The previous prime is 1828821469. The next prime is 1828821539. The reversal of 1828821537 is 7351288281.

1828821537 is a `hidden beast` number, since 18 + 2 + 88 + 21 + 537 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1828821537 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1828821492 and 1828821501.

It is not an unprimeable number, because it can be changed into a prime (1828821539) 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, 15837 + ... + 62517.

It is an arithmetic number, because the mean of its divisors is an integer number (169455660).

Almost surely, 2^1828821537 is an apocalyptic number.

It is an amenable number.

1828821537 is a deficient number, since it is larger than the sum of its proper divisors (882469023).

1828821537 is a wasteful number, since it uses less digits than its factorization.

1828821537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48141 (or 48135 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 1828821537 is about 42764.7230436490. The cubic root of 1828821537 is about 1222.8985850747.

The spelling of 1828821537 in words is "one billion, eight hundred twenty-eight million, eight hundred twenty-one thousand, five hundred thirty-seven".