1864442730 has 32 divisors (see below), whose sum is σ = 4476181248. Its totient is φ = 497016000.

The previous prime is 1864442707. The next prime is 1864442743. The reversal of 1864442730 is 372444681.

It is a super-2 number, since 2×1864442730² = 6952293386899705800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97455 + ... + 115005.

It is an arithmetic number, because the mean of its divisors is an integer number (139880664).

Almost surely, 2^1864442730 is an apocalyptic number.

1864442730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1864442730 is an abundant number, since it is smaller than the sum of its proper divisors (2611738518).

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

1864442730 is a wasteful number, since it uses less digits than its factorization.

1864442730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21102.

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 1864442730 is about 43179.1932532325. The cubic root of 1864442730 is about 1230.7873272389.

The spelling of 1864442730 in words is "one billion, eight hundred sixty-four million, four hundred forty-two thousand, seven hundred thirty".