1868392427 has 16 divisors (see below), whose sum is σ = 2095801344. Its totient is φ = 1650888000.

The previous prime is 1868392399. The next prime is 1868392433. The reversal of 1868392427 is 7242938681.

It is a cyclic number.

It is not a de Polignac number, because 1868392427 - 2²² = 1864198123 is a prime.

It is a super-2 number, since 2×1868392427² = 6981780522541900658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1868392447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114578 + ... + 129864.

It is an arithmetic number, because the mean of its divisors is an integer number (130987584).

Almost surely, 2^1868392427 is an apocalyptic number.

1868392427 is a deficient number, since it is larger than the sum of its proper divisors (227408917).

1868392427 is a wasteful number, since it uses less digits than its factorization.

1868392427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15610.

The product of its digits is 1161216, while the sum is 50.

The square root of 1868392427 is about 43224.9051705148. The cubic root of 1868392427 is about 1231.6558277360.

The spelling of 1868392427 in words is "one billion, eight hundred sixty-eight million, three hundred ninety-two thousand, four hundred twenty-seven".