1863968490 has 64 divisors (see below), whose sum is σ = 5021896320. Its totient is φ = 491927040.

The previous prime is 1863968489. The next prime is 1863968503. The reversal of 1863968490 is 948693681.

1863968490 is a `hidden beast` number, since 1 + 8 + 63 + 96 + 8 + 490 = 666.

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

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 9396 + ... + 61775.

It is an arithmetic number, because the mean of its divisors is an integer number (78467130).

Almost surely, 2^1863968490 is an apocalyptic number.

1863968490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1863968490 is an abundant number, since it is smaller than the sum of its proper divisors (3157927830).

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

1863968490 is a wasteful number, since it uses less digits than its factorization.

1863968490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71284 (or 71278 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The square root of 1863968490 is about 43173.7013701628. The cubic root of 1863968490 is about 1230.6829639586.

The spelling of 1863968490 in words is "one billion, eight hundred sixty-three million, nine hundred sixty-eight thousand, four hundred ninety".