1861350369 has 8 divisors (see below), whose sum is σ = 2483199552. Its totient is φ = 1240200720.

The previous prime is 1861350367. The next prime is 1861350373. The reversal of 1861350369 is 9630531681.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1861350369 - 2¹ = 1861350367 is a prime.

It is a super-2 number, since 2×1861350369² = 6929250392352872322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1861350369.

It is not an unprimeable number, because it can be changed into a prime (1861350367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168642 + ... + 179339.

It is an arithmetic number, because the mean of its divisors is an integer number (310399944).

Almost surely, 2^1861350369 is an apocalyptic number.

It is an amenable number.

1861350369 is a deficient number, since it is larger than the sum of its proper divisors (621849183).

1861350369 is a wasteful number, since it uses less digits than its factorization.

1861350369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349767.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 1861350369 is about 43143.3699309639. The cubic root of 1861350369 is about 1230.1064902183.

The spelling of 1861350369 in words is "one billion, eight hundred sixty-one million, three hundred fifty thousand, three hundred sixty-nine".