1361987850 has 48 divisors (see below), whose sum is σ = 3380051520. Its totient is φ = 362947200.

The previous prime is 1361987831. The next prime is 1361987857. The reversal of 1361987850 is 587891631.

It is a self number, because there is not a number n which added to its sum of digits gives 1361987850.

It is not an unprimeable number, because it can be changed into a prime (1361987857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 344686 + ... + 348614.

It is an arithmetic number, because the mean of its divisors is an integer number (70417740).

Almost surely, 2^1361987850 is an apocalyptic number.

1361987850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1361987850 is an abundant number, since it is smaller than the sum of its proper divisors (2018063670).

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

1361987850 is a wasteful number, since it uses less digits than its factorization.

1361987850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6255 (or 6250 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 1361987850 is about 36905.1195635511. The cubic root of 1361987850 is about 1108.4711929571.

The spelling of 1361987850 in words is "one billion, three hundred sixty-one million, nine hundred eighty-seven thousand, eight hundred fifty".