1361988 has 24 divisors (see below), whose sum is σ = 3531360. Its totient is φ = 453960.

The previous prime is 1361963. The next prime is 1361999. The reversal of 1361988 is 8891631.

It is a super-2 number, since 2×1361988² = 3710022624288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6198 + ... + 6413.

It is an arithmetic number, because the mean of its divisors is an integer number (147140).

2^1361988 is an apocalyptic number.

1361988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1361988 is an abundant number, since it is smaller than the sum of its proper divisors (2169372).

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

1361988 is a wasteful number, since it uses less digits than its factorization.

1361988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12624 (or 12616 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1361988 is about 1167.0424156816. The cubic root of 1361988 is about 110.8471233650.

It can be divided in two parts, 13 and 61988, that added together give a square (62001 = 249²).

The spelling of 1361988 in words is "one million, three hundred sixty-one thousand, nine hundred eighty-eight".