1868452390 has 16 divisors (see below), whose sum is σ = 3843673632. Its totient is φ = 640612224.

The previous prime is 1868452379. The next prime is 1868452393. The reversal of 1868452390 is 932548681.

It is a super-2 number, since 2×1868452390² = 6982228667393424200, 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 1868452390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868452393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13346019 + ... + 13346158.

It is an arithmetic number, because the mean of its divisors is an integer number (240229602).

Almost surely, 2^1868452390 is an apocalyptic number.

1868452390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1868452390 is an abundant number, since it is smaller than the sum of its proper divisors (1975221242).

1868452390 is a wasteful number, since it uses less digits than its factorization.

1868452390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26692191.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 1868452390 is about 43225.5987812777. The cubic root of 1868452390 is about 1231.6690035884.

The spelling of 1868452390 in words is "one billion, eight hundred sixty-eight million, four hundred fifty-two thousand, three hundred ninety".