1861248363 has 32 divisors (see below), whose sum is σ = 2735824896. Its totient is φ = 1118387328.

The previous prime is 1861248359. The next prime is 1861248371. The reversal of 1861248363 is 3638421681.

It is not a de Polignac number, because 1861248363 - 2² = 1861248359 is a prime.

It is a super-3 number, since 3×1861248363³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1861248313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1020070 + ... + 1021892.

It is an arithmetic number, because the mean of its divisors is an integer number (85494528).

Almost surely, 2^1861248363 is an apocalyptic number.

1861248363 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1861248363 is a deficient number, since it is larger than the sum of its proper divisors (874576533).

1861248363 is a wasteful number, since it uses less digits than its factorization.

1861248363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443.

The product of its digits is 165888, while the sum is 42.

The square root of 1861248363 is about 43142.1877400764. The cubic root of 1861248363 is about 1230.0840189814.

The spelling of 1861248363 in words is "one billion, eight hundred sixty-one million, two hundred forty-eight thousand, three hundred sixty-three".